A 52-year-old man is in "stable condition" in hospital following a three-vehicle collision in Warwick last night.The Southampton resident was riding a motorcycle near the junction of Middle Road and Longford Road around 10.20pm when the accident occurred.A 59-year-old Warwick woman and a 49-year-old Hamilton Parish man also involved in the accident, were treated for their injuries at King Edward VII Memorial Hospital and released.A police investigation is now underway. Witnesses are asked to telephone PC Lesa Stovell on 295-0011.