BEIRUT (Reuters) – Lebanon has asked 11 countries and the United Nations to help train its security forces after a string of bombings and assassinations that have fuelled fears of a slide into chaos, the prime minister said on Thursday. "We have knocked on the doors of all the countries that could help us," Fouad Siniora told a news conference after the cabinet’s weekly meeting. "We are not facing an ordinary criminal…But we will gather all the tools, training and expertise we can obtain to live up to the challenge," he said. The countries which have responded positively to Lebanon’s plea were the United States, France, Russia, Egypt and Qatar, Siniora said. The government has also asked for help from six other states including Britain, Canada and China. Twelve explosions have rocked Lebanon since the Feb. 14 assassination of former Prime Minister Rafik al-Hariri, which plunged the country into its worst political and security crisis since the end of the 1975-1990 civil war.