A Brooklyn biker was fatally struck and dragged by a car after he ran a red light last night, witnesses and cops said.

Nicolas Djandji, 24, was cycling with a pal east on Borinquen Place and turning northbound at intersection on Rodney Street in Williamsburg, when he was hit by a black 2001 Toyota that was traveling west on Borinquen Place.

“The car dragged him and there was blood everywhere,” said Samantha Sota, 17.

Djandji was found unconscious at the scene, and was pronounced dead at Woodhull Hospital.

The driver stayed at the scene, and police say no criminality is suspected.