(KRON) -- An 18-year-old man is in critical condition following a violent Tuesday in Antioch. Authorities are investigating two shootings connected to a “rolling gun battle” and a third that injured a teenager, according to the Antioch Police Department. At 12:42 p.m., Antioch police responded to reports of a shooting on the 2100 block of Peppertree Way. Officers canvassed the area and located evidence of a shooting, Antioch PD said. While officers were at the scene, an 18-year-old man arrived at a local hospital suffering from a gunshot wound, according to authorities. Investigators determined that the gunshot victim was at the scene of the shooting. The man is in critical but stable condition, police said Tuesday, and is expected to survive. Gas station robber had loaded ‘ghost gun’: Santa Rosa police At 6:18 p.m., Antioch police responded to a separate report of shots fired in the area of Sycamore Drive and L Street. Arriving officers found a vehicle rollover crash in the parking lot of Sycamore Square and evidence of a shooting between L Street and Peppertree Way, the police department said. More reports of another shooting on Auto Center Drive near Century Boulevard came in to Antioch dispatchers, and arriving officers located evidence of gunfire, police said. One victim reported to police that their vehicle had been struck by gunfire. The rollover crash was determined to be the result of a driver veering off the roadway to avoid the gunfire, Antioch PD said. Authorities said they believe the two evening shootings are connected to a “rolling gun battle” and are searching for the involved vehicles and suspects.