Afghan security services have arrested five men in connection with the massacre at a Pakistan military school last month that killed 150 people, most of them children, officials said Saturday.

Afghanistan’s parliament approved agreements Sunday with the U.S. and NATO allowing international troops to remain in the country past the end of this year amid a renewed offensive by Taliban militants.

Afghan President Ashraf Ghani Ahmadzai vowed Saturday to crack down on corruption and ensure security in his nation, even as insurgent attacks in an eastern province killed at least 12 local troops.