HOUSTON (KTRK) -- Law enforcement tells Eyewitness News a homeowner fired on four would-be robbers in an alleged attempted home invasion in north Harris County.Authorities say four people posing as deliverymen forced their way into the home on Lockridge and sheriff's department investigators say the supsects held the residents at gunpoint while they robbed the home. Detectives say when the robbers made their getaway, the homeowner picked up his gun and opened fire.The suspects ran out of the residence with the homeowner chasing them. He fired further on their vehicle.A 17-year-old suspect was shot and sent to Conroe Regional Hospital for his injuries.Three others got away. Authorities are searching for them in the neighborhood.Authorities say they found stolen items in the back seat of the suspects' vehicle.