A fierce clash erupted between government forces and Haqqani network insurgents in Sayed Karam district on Tuesday night and lasted for a while.

Shirzaman, alias Mohammad Omar, who served as the intelligence chief for the militant group in the eastern region, had been killed, the officer said.

No civilians or security personnel sustained casualties during the overnight operations, he added.

The Haqqani network is an Afghan guerrilla insurgent group using asymmetric warfare to fight against U.S.-led NATO forces and the Afghan government. It is an offshoot of the Taliban.