Gunmen killed two civilians and bombs wounded four policemen in southern Thailand on Wednesday as Thai authorities arrested three suspected insurgents. The two men were killed as they left a tea shop in Narathiwat province when four assailants got out of their pickup truck and fired dozens of shots from assault rifles, the Associated Press quoted police Lt. Vorapong Klomsakun as saying. In Yala province, a roadside bomb wounded three border patrol policemen who were in a van on patrol duty. Another bomb, hidden beneath a motorcycle, exploded in front of a school in Narathiwat, wounding one policeman. The bomb was triggered by a mobile phone, police said. Meanwhile, three men were arrested in connection with a 30-minute gunfight Tuesday night in Pattani province, in which three policemen and two suspected insurgents were killed, said army spokesman Akara Thiprote.