A man in Antioch was hit on the head with a shotgun and robbed Thursday evening, according to police.Officers responded to an armed robbery at Manzanita Way near Mahogany Way at around 6:45 p.m., according to the Antioch Police Department. A man told police he had been approached by three armed suspects who demanded he hand over his wallet. He said he was hit in the head with a shotgun carried by one of the suspects. The three men reportedly stole his wallet, which was empty, and fled north on foot on Manzanita Way. Responding officers conducted a search of the area but were not able to locate any of the three suspected robbers.Anyone with information regarding the robbery is encouraged to contact the Antioch Police Department at (925) 778-2441.