Las Vegas ? Police searched for two gunmen Wednesday who wounded six young people at a bus stop, an attack that officials believe stemmed from a fight about a girl. Tight security met students entering high schools.

The six were wounded Tuesday shortly after a group of Mojave High School students got off a school bus in a working-class neighborhood in northeastern Las Vegas.

The investigation was focused at Mojave, but security also was increased elsewhere, said Clark County School District police Lt. Ken Young.

“We’ve got extra officers at several high schools,” Young said.

Police were search for at least two suspects. The attackers were believed to have fled the scene of the shooting on foot.