At least three people were killed and 19 others were injured when an explosion hit east Nigeria's Taraba state, local police said. The incident happened on Tuesday at a crowded restaurant in the Irawe town of the state, said Usman Abdullahi, the police spokesperson in Taraba, at a press briefing in Jalingo, the state capital, Xinhua news agency reported. Abdullahi said the injured were rushed to a hospital in Jalingo, and an investigation has been launched by the police. No group or individual has claimed responsiblity for the blast.