Huntsville police are investigating after 4 men attacked a delivery driver.

The man was unloading his truck at Rosie’s Cantina, 7540-A South Memorial Parkway, about 5 a.m. Monday when a man with a gun demanded his wallet, said Lt. Michael Johnson, police spokesman.

A fight ensued, with three more men joining the attack against the victim, Johnson said.

The victim fell and hit his head and was transported to Huntsville Hospital with non-life-threatening injuries, police said.