A man wanted for involvement in bombings of tourist resorts in Sinai killed himself by accident on Friday while trying to attack police who were pursuing him, security sources said. Arafat Ali, 28, was blown up by an explosive device which he had tried to throw at policemen who had encircled him in Rafah, a town which is straddles Egypt's border with the Gaza Strip.The sources said he was second in command of a group called Tawhid wal Jihad, which the authorities say has carried out a series of attacks in Sinai since October 2004. They describe it as a group of Bedouin from the Sinai peninsula with militant Islamist views. The police say they killed the group's leader earlier this month. The group's last attack was last month in Dahab. Nineteen people were killed.