WASHINGTON (AP) — The nation's schools chief says more needs to be done to make sure children live long enough to attend college. He is joining more than 350 university presidents in urging Congress to take action to protect students from gun violence.

Education Secretary Arne (AR'-nee) Duncan told reporters Monday that guns have no place in schools or on college campuses, other than in the hands of law enforcement. Standing with members of College Presidents for Gun Safety, Duncan also said pressure from outside Washington is needed to force Congress to act on proposals to reduce gun violence.

In the wake of the Newtown, Conn., school shooting that killed 20 students, lawmakers have considered new measures including expanded background checks for gun buyers and a ban on some types of weapons.