A Kenya Defense Force soldier runs for cover near the perimeter wall where attackers are holding up at a campus in Garissa April 2, 2015. At least 14 people were killed on Thursday when Islamist militant group al Shabaab stormed the Kenyan university campus, taking Christians hostage and engaging security forces in a shootout for several hours. (Photo by Noor Khamis/Reuters)

Kenya Defence Forces tank drives outside the Garissa university college, Thursday, April 2, 2015. Al-Shabab gunmen attacked Garissa University College in northeast Kenya early Thursday, targeting Christians and killing at least 15 people and wounding 60 others, witnesses said. (Photo by AP Photo/Stringer)

A Kenyan soldier takes cover as shots are fired in front of Garissa University in Garissa town, located near the border with Somalia, some 370km northeast of the capital Nairobi, Kenya, 02 April 2015. At least 15 people have been killed and some 60 were injured in an attack carried out by Somalia's Islamist militant group al-Shabab, according to local media reports. (Photo by Dai Kurokawa/EPA)

A member of Kenya Defence Forces secures the area of the Garissa University college, in Garissa, Kenya, Thursday, April 2, 2015. (Photo by Khalil Senosi/AP Photo)

Kenyan police officers take cover outside the Garissa University College during an attack by gunmen in Garissa, Kenya, Thursday, April 2, 2015. Gunmen attacked the university early Thursday, shooting indiscriminately in campus hostels. Police and military surrounded the buildings and were trying to secure the area in eastern Kenya, police officer Musa Yego said. (Photo by AP Photo/Stringer)

A Kenya Defence Forces soldier secures the area around the Garissa University college, in Garissa, Kenya, Thursday, April 2, 2015. Al-Shabab gunmen attacked Garissa University College in northeast Kenya early Thursday, targeting Christians and killing over 100 people and wounding others, according to Kenya's national disaster operations center and the interior minister. (Photo by Khalil Senosi/AP Photo)

A Kenya Defense Force soldier runs for cover near the perimeter wall where attackers are holding up at a campus in Garissa April 2, 2015. At least 14 people were killed on Thursday when Islamist militant group al Shabaab stormed the Kenyan university campus, taking Christians hostage and engaging security forces in a shootout for several hours. (Photo by Noor Khamis/Reuters)

A Kenya Defense Force soldier takes cover near the perimeter wall where attackers are holding up at a campus in Garissa April 2, 2015. (Photo by Noor Khamis/Reuters)

Members of Kenya's Defence Forces secure the area of the Garissa University college, in Garissa, Kenya, Thursday, April 2, 2015. Witnesses say the gunmen who stormed a college in Kenya this morning identified themselves as members of al-Shabab, the Islamic extremist group from neighboring Somalia. A mortuary attendant in the town of Garissa says at least 15 people have been killed in the attack and 60 injured. (Photo by Khalil Senosi/AP Photo)

Kenyan soldiers take cover as shots are fired in front of Garissa University in Garissa town, located near the border with Somalia, some 370km northeast of the capital Nairobi, Kenya, 02 April 2015. (Photo by Daniel Irungu/EPA)

Kenyan soldiers take cover as heavy gunfire continues in front of Garissa University in Garissa town, located near the border with Somalia, some 370km northeast of the capital Nairobi, Kenya, 02 April 2015. The government said 70 people have been killed and 79 others have been injured in an attack carried out by Somalia's Islamist militant group al-Shabab. (Photo by Dai Kurokawa/EPA)

Kenyan soldiers and ambulance workers run as they prepare to evacuate students who were rescued out of the building at Garissa University in Garissa town, located near the border with Somalia, some 370 km northeast of the capital Nairobi, Kenya, 02 April 2015. (Photo by Dai Kurokawa/EPA)

A tank moves into Garissa University campus as soldiers take cover in Garissa town, located near the border with Somalia, some 370 km northeast of the capital Nairobi, Kenya, 02 April 2015. (Photo by Dai Kurokawa/EPA)

A member of Kenya's Defence Forces secures the area of the Garissa University college, in Garissa, Kenya, Thursday, April 2, 2015. (Photo by Khalil Senosi/AP Photo)

Medics help an injured person at Kenyatta National Hospital in Nairobi, Kenya, Thursday, April 2, 2015, after being airlifted from Garissa after an attack by gunmen at Garissa University College in northeastern Kenya on Thursday morning. Witnesses say the gunmen who stormed a college in Kenya Thursday morning identified themselves as members of al-Shabab, the Islamic extremist group from neighboring Somalia. (Photo by AP Photo/Stringer)

Students of the Garissa University College take shelter in a vehicle after fleeing from an attack by gunmen in Garissa, Kenya, Thursday, April 2, 2015. (Photo by AP Photo/Stringer)

A member of Kenya Defence Forces patrols the area of the Garissa University college, in Garissa, Kenya, Thursday, April 2, 2015. (Photo by Khalil Senosi/AP Photo)

A member of Kenya Defence Forces secures the area of the Garissa University college, in Garissa, Kenya, Thursday, April 2, 2015. (Photo by Khalil Senosi/AP Photo)

A member of Kenya Defence Forces secures the area of the Garissa University college, in Garissa, Kenya, Thursday, April 2, 2015. (Photo by Khalil Senosi/AP Photo)

Kenyan police officers take positions outside the Garissa University College as an ambulance carrying the injured going to a hospital, during an attack by gunmen in Garissa, Kenya, Thursday, April 2, 2015. Gunmen attacked the university early Thursday, shooting indiscriminately in campus hostels. Police and military surrounded the buildings and were trying to secure the area in eastern Kenya, police officer Musa Yego said. (Photo by AP Photo/Stringer)

Medics help an injured person at Kenyatta national Hospital in Nairobi, Kenya, Thursday, April 2, 2015, after being airlifted from Garissa after an attack by gunmen at Garissa University College in northeastern Kenya on Thursday morning. (Photo by AP Photo/Stringer)

A member of Kenya Defence Forces secures the area of the Garissa University college, in Garissa, Kenya, Thursday, April 2, 2015. (Photo by Khalil Senosi/AP Photo)

Medics help an injured person at Kenyatta national Hospital in Nairobi, Kenya, Thursday, April 2, 2015, after being airlifted from Garissa after an attack by gunmen at Garissa University College in northeastern Kenya on Thursday morning. (Photo by AP Photo/Stringer)

Kenyan Defence Forces run towards the Garissa University campus after an attack by Somalia's Al-Qaeda-linked Shebab gunmen in Garissa on April 2, 2015. At least 70 students were massacred when Somalia's Shebab Islamist group attacked a Kenyan university today, the interior minister said, the deadliest attack in the country since US embassy bombings in 1998. (Photo by Carl De Souza/AFP Photo)

A female student hostage is escorted out of Garissa University after Kenya Defence Forces ended a siege by terrorist gunmen on April 2, 2015. (Photo by Carl De Souza/AFP Photo)

Kenya Defence Forces are pictured after they ended a siege by gunmen in the university on April 2, 2015 in the northeastern town of Garissa. (Photo by Carl De Souza/AFP Photo)

A Kenya Defence Forces soldier stands guard before they ended a siege by gunmen in the university campus of the northeastern town of Garissa on April 2, 2015. (Photo by Carl De Souza/AFP Photo)

Paramedics help a student who was injured during an attack by Somalia's Al-Qaeda-linked Shebab gunmen on the Moi University campus in Garissa on April 2, 2015. (Photo by Carl De Souza/AFP Photo)