State police last night arrested two Catonsville-area boys who allegedly threw rocks from shrubbery onto the outer loop of Interstate 695 near Edmondson Avenue and struck three tractor-trailers, injuring a passenger in one truck.
The boys, ages 13 and 15, were arrested about 7 p.m. at their homes based on information from witnesses, said Trooper William George of the Golden Ring barracks.

