ROSEMEAD ( — Police say a man was killed while out riding his bicycle in Rosemead early Saturday after being struck by two hit-and-run drivers.

At 2:50 a.m., Heriberto Ruiz was riding southbound in the right-hand lane on Rosemead Boulevard. He veering towards the right side of the lane when he was struck by a vehicle in the same lane accelerating past him, California Highway Patrol reports.

The 47-year-old was knocked down and the driver sped off. CHP has no description of this vehicle.

CHP says another motorist in a late 2000 model white mini-van struck Ruiz and also failed to stop.

Meanwhile, another driver stopped to lend aid.

Ruiz died at the scene.

His family told CBS2/KCAL9 he had no children but was devoted to his nieces and nephews.

They’re not sure why he was riding his bike at that time of night.

The wife of Ruiz’s nephew said it “doesn’t matter if it’s 2:50 a.m. or 6 p.m., nobody should do what this person did.”

His sister Leticia Ruiz had this message for the drivers: “Have a conscience. Turn yourself in. You have a family who’s hurting.”

Anyone with information about the deadly crash is urged to contact CHP’s East Los Angeles office at (323) 980-4600.