Kenya’s Interior Minister has accused security officers of ignoring warnings about a potential attack before the Al-Shabaab assault on Garissa University College, which left 148 students dead.

Joseph Nkaisserry told a parliamentary committee in Nairobi that the response to the attack was also poorly coordinated, reports the BBC.

After the 2 April attack, during which Christians were singled out and killed, the college’s Christian Union chairman pleaded for prayer for the physical and psychological healing of survivors.

“Please pray for us … Many saw sights too horrible to describe,” said 21-year-old Frederick Gitonga.

“Pray for me too. I am struggling with dreams that cause me to snap awake, then [I] cannot get back to sleep. I find myself remembering the horror of that day. The sounds and smells come back clearly.”