RICHMOND, Va. >> A gunman who opened fire minutes after a high school graduation in Richmond, Virginia, targeted an 18-year-old graduate he had a long-running dispute with, police said Wednesday.

Shawn Jackson, 18; and his father, Lorenzo Smith, 36, both were killed Tuesday in the gunfire, which sent hundreds fleeing in panic outside the state capital’s Altria Theater after the graduation ceremony for Huguenot High School. Five other people were wounded by gunfire and at least 12 more suffered other injuries or were treated for anxiety due to the mayhem, according to police.

Richmond interim Police Chief Rick Edwards said the shooting suspect, Amari Pollard, 19, knew Jackson and the two had been embroiled in a dispute for more than a year. Edwards said the nature of the dispute is still being investigated.

“This was targeted at one individual. ... That’s what we know at this time,” Edwards said.

— The Associated Press