Updated

A $100,000 reward is being offered to catch eight arsonists who hurled Molotov cocktails at apartments in a Los Angeles public housing project.

The pre-dawn attack on May 12 caused minor to moderate damage to the homes of four families at Ramona Gardens but nobody was hurt.

The Eastside complex is overwhelmingly Latino but three of the victim families are black. Investigators are trying to determine whether the attacks were racially motivated and whether gangs were involved.

At a Wednesday news conference, authorities showed surveillance video of eight people crossing a freeway bridge to the project. Shadowy figures lit the firebombs and threw them at residences before sprinting away.

The attacks are under investigation by a task force of federal agents and local police and fire investigators.