After a deadly attack on Kenyan students, a senior police official is urging Kenyans who may find themselves in a similar predicament to fight back and avoid being killed "like cockroaches."

Pius Masai Mwachi, a Kenyan police superintendent, spoke Thursday at a Nairobi morgue holding the bodies of some of the 148 people who died in the April 2 attack by Islamic militants at a college in Garissa town.

Mwachi says any Kenyans who fall into the hands of militants should not allow themselves to be divided along ethnic and religious lines, "like what happened in the Garissa attack."

Survivors say gunmen from the al-Shabab extremist group targeted Christian students for killing after separating them from Muslims, though there were also many accounts of indiscriminate shooting.