About 200 Pakistani Christians have marched in Peshawar to protest over the murder and mutilation of a priest and his driver.
The bodies of Protestant priest Babar Shamoun and Daniel Emmanuel were found near the North-West Frontier Province's capital on Thursday.
The protesters blocked a main road for more than two hours, demanding the killers be brought to justice.
A woman and a man have been arrested in connection with the killings.
The men's bodies were found dumped on a roadside.
"The victims had been stabbed and shot," a senior police officer told the AFP agency.
Some reports said one of the victims' hands had been cut off, others that ears and noses had also been severed.
Police said the priest had been running a non-governmental organisation in the education sector in the region.
They say a motive for the killing is unclear, although they are investigating the possibility of a personal dispute.
However, Christian leaders said it was a "targeted act of terrorism" meant to intimidate Christians.
Christians make up less than two per cent of Pakistan's 150m people.