Nairobi, April 3 (RHC)-- The death toll from an attack by al-Shabab militants on a university in the town of Garissa in eastern Kenya has risen to 147, Kenyan government officials say. The officials said that security forces killed all four attackers who had taken hundreds of students hostage at the Garissa University College campus on Thursday.

The officials added that 587 students had been rescued, and 79 of them were injured during the rescue operation. Local sources say security has been extremely beefed up in the region and all communications and mobile networks have been cut off. The government has also ordered a night curfew in the town and nearby cities.

Early on Thursday, the gunmen stormed the campus, located some 150 kilometers (90 miles) from the border with Somalia. Somalia-based al-Shabab militants claimed responsibility for the attack, saying it was carried out in revenge for Kenya’s military operations in Somalia.

Kenya’s northern and eastern regions, which border Somalia, have been the scene of violent attacks blamed on al-Shabab militants from Somalia.