A joint Afghan-NATO operation in a volatile region in the country's dangerous south has killed 40 militants, including the Taliban's leader in that region, a government official said Monday. The operation in the Nad Ali and Murja districts of Helmand province began on Thursday and continued through Monday, said Dawood Ahmadi, spokesman for Helmand's governor. Ahmadi said that 40 militants have died in the operation, though he said that government officials had recovered only seven bodies, which were given to tribal elders for burial. Ahmadi said the government knows another 33 fighters were killed through intelligence sources. Among the dead was a Mullah Salim, a Taliban leader who was the head of the militant's council in the two districts, Ahmadi said. The councils, also called shuras, are sometimes referred to as a shadow government structure that operates separately from the Afghan government.