A gunman opened fire at a roller-skating rink birthday party in the US State of Texas late on Saturday, killing five people and wounding four others before turning the gun on himself, police said. Police were called to Forum Roller World in Grand Prairie, about 20 miles west of Dallas, following reports of a shooting, Grand Prairie Police Department spokesman John Brimmer said. The incident began when an unidentified man drew a gun during an argument at a birthday party at the rink. He opened fire, shooting five people dead and wounding four others, and then shot himself, Brimmer said. A private family group had rented the entire skate rink for the evening to celebrate a child\'\'s birthday, Brimmer said. All the dead and wounded were teenagers and adults attending the gathering.