BENGHAZI — Unknown gunmen shot dead the top commander of Libya's military police force as he left his house in the eastern city of Benghazi to attend Friday prayers, a security source said. “Several shots hit Ahmed Al-Barghathi. He was brought to hospital but later died there,” the source said. Benghazi in the restive east of the OPEC producer has been hit by a wave of violence by armed groups and radicals. Meanwhile, gunmen attacked a police checkpoint in the Wadi Rabie district in south east Tripoli Friday, wounding two policemen. According to an SSC source, the attackers were members of a central region Libya Shield battalion. He confirmed that four men had been arrested following the incident. The reason for the attack is unclear, although the source suggested that alcohol may have been to blame. The central region Shield forces are drawn from places such as Misrata and Khoms. Attacks on checkpoints have been almost unknown in Tripoli, unlike in Benghazi. — Agencies