The suspected killer of leftist opposition politician Chokri Belaid whose murder sparked a political crisis in Tunisia was arrested on Monday, police sources said. They said the suspect was arrested along with an alleged accomplice, both members of the radical Muslim Salafist movement. The main suspect, a 31-year-old furniture maker, was arrested in the Carthage suburb of Tunis. A source who wished to remain anonymous said "the two young men allegedly belong to a hardline religious group." adding that an investigation is still underway.