Kenyan police have arrested five suspects in connection with Thursday's attack at Garissa University College

Al-Shabaab gunmen opened fire, and 147 people died Garissa, Kenya (CNN)Kenyan police have arrested five suspects in connection with Thursday's attack at Garissa University College, Interior Minister Joseph Nkaissery said Friday, according to CNN affiliate NTV. Nkaissery told reporters the university will be able to confirm Saturday if everyone has been accounted for. Thursday's attack by al-Shabaab militants killed 147 people, including 142 students, three security officers and two university security personnel. The attack left 104 people injured, including 19 who are in critical condition, Nkaissery said. During search and recovery efforts on Friday, CNN witnessed one male who was not a student hiding under a bed. That male was taken into custody and was being treated as a suspect, sources close to the search told CNN. The find sparked an additional search of the building. Sources said three people, all students, were found alive. A female student was found under a pile of bodies, another female student was hiding in a wardrobe and a male student was hiding in the bathroom, the sources confirmed to CNN. Student Hellen Titus said she survived by fooling the attackers into thinking she was dead. After gunmen shot fellow students, she smeared their blood onto her body to make it seem she'd been shot, too, she told CNN on Friday at a makeshift center for evacuated students. "In the time of shooting," she said, "they skipped me." Most of the victims had been shot from behind, in the back of the head, a medic told CNN. "They're facing down, always," a worker with St. John's ambulance service said Friday. "They're always facing down, and they're shot in the heads, around the back." Al-Shabaab's long, bloody legacy with Kenya Raging gunfire Early Thursday, an explosion and gunfire cut through the morning quiet on the campus about 90 miles (145 kilometers) from Kenya's border with Somalia, tearing many students in dormitories out of their sleep. "Never heard anything like this," journalist Dennis Okari from CNN affiliate NTV tweeted as he watched smoke rising over a student hostel. Al-Shabaab gunmen had first stormed a Christian prayer service, where they killed some and took others hostage. Then they went across campus with them, shooting non-Muslims and sparing Muslims, a witness said. They headed for the hostels. Student Japhet Mwala lay in her bed. "We were sleeping when we heard a loud explosion that was followed by gunshots, and everyone started running for safety," she told Agence France-Presse. Awaking to terror: 'I am lucky to be alive' "There are those who were not able to leave the hostels where the gunmen headed and started firing. I am lucky to be alive because I jumped through the fence with other students," she said. Students ran -- some crawled -- away from the gunfire, Okari said. At one point, the gunmen pinned down a building where 360 students lived, Interior Minister Joseph Nkaissery said. Okari took cover outside the campus and listened to explosions and gunfire for four hours. Kenyan security forces moved in and killed four gunmen. Heavy gunfire & explosions inside the university. I met Anastacia at the airstrip with serious gunshot wounds. pic.twitter.c om/ZcKQT OQnzh— Dennis Okari (@DennisOkari) April 2, 2015 Porous border Somali terror group Al-Shabaab, an al Qaeda affiliate, claimed responsibility for the attack. The Interior Ministry has posted a "most wanted" notice for a man in connection with it. It offered a reward of 20 million Kenyan shillings, about $215,000, for Mohamed Mohamud, who goes by the aliases Dulyadin and Gamadhere. The post does not say what role the man may have played. Kenyan police are circulating "Wanted Dead or Alive" posters featuring eight terror suspects who are wanted in separate attacks in Kenya, the Interior Ministry said. Police are offering a bounty of more than $210,000 for the suspects, the Ministry said via Twitter. We appeal to anyone with any info on #Gamadher eto share with relevant authorities and security agencies.