Ghulam Shabir Arif and Ali Ahmed Arif were on death row since 2002. Ghulam had killed Deputy Superintendent of Police, Anwar Khan and his driver while Ali was accused of killing three men."The two terrorists, Ali and Ghulam, were executed early this morning. Both were involved in murder cases and both belonged to Sipah-e-Sahaba," said Saeedullah Gondal, an official at the central jail in the city of Multan.Following the attack on the Army Public School in Peshawar which killed 148 people, most of them children, Prime Minister Nawaz Sharif lifted the ban on executions in terrorism cases. Nine persons have been hanged since then.Strict security measures were put in place during the latest executions and unauthorised persons were not allowed to enter the prison during the time of the hangings.Following the executions, the bodies were sent to a morgue.Human rights groups say they believe Pakistan has about 8,000 prisoners on death row with more than 500 of them sentenced for terrorist offences.