Trail goes cold in hunt for Bangkok shrine bomber

By Amy Sawitta Lefevre BANGKOK (Reuters) - Thai police said on Wednesday they had still not established the nationality or whereabouts of the man they suspect bombed a Bangkok shrine, killing at least 20 people, suggesting the trail had gone cold after he was captured by CCTV at the scene. Authorities said they were keeping watch for the suspect at the country's borders, but police chief Somyot Pumpanmuang told a news conference that it was not clear how many people were involved in the attack o