BANGKOK, Thailand — Eight bombs exploded almost simultaneously at car and motorcycle showrooms in restive southern Thailand today, wounding nine people, police said. The blasts were believed to have been carried out by Muslim insurgents, police said. Attackers posing as customers planted explosives inside cars or near motorcycles at Honda, Nissan, Chevrolet, Mazda, Ford and Isuzu dealerships and at two motorcycle showrooms, Yala police Lt. Col. Sakkarin Bamphensamai said. He said without elaborating that the blasts bore the trademarks of Muslim separatists. Police Col. Phumphet Phiphatpetchphoom said that initial reports showed that nine people were wounded. The attacks came one...