HOUSTON — Police are trying to determine what sparked a drive-by shooting in east Harris County.

It happened on Waldine Street near Beltway 8 just before midnight.

A man told police he was sitting on his front porch when a car drove by and someone inside began shooting at him.

Police say a bullet grazed the man, but that didn’t stop him from pulling out his own gun and returning fire. His bullets struck the driver in the arm and a passenger in the back, police said.

No one was seriously hurt.