In a daring attack, Maoist rebels ambushed security forces personnel late Monday in West Bengal's Bankura district, injuring five policemen and abducting seven, police said.

A large number of ultras separately attacked two security forces' camps at Chandapathar and Satnala under Barikul police station in the district, 165 km from the capital, at around 11 pm leading to a heavy exchange of fire between the policemen and the Maoists for over one and a half hours, police sources said.