A priest was killed and another injured after unidentified men opened fire on them after Sunday mass outside All Saints Church near Peshawar's Ring Road.
The deceased has been identified as Willian Sairaj. His friend, Patrick, has, on the other hand, been moved to the Lady Reading Hospital.
The police have reached the site and sealed it. A search operation is under way. Investigation teams have arrived to collect evidence from the area as well.
At a press conference later in the day, Peshawar CCPO Ahsan Abbas said the suspects were on a motorcycle. They opened fire at the van carrying the priests.
"Terrorists are attacking soft groups in the city," he said, adding that the police receives general threats every now and then but weren't aware of a possible attack outside the church.
Meanwhile, Khyber Pakhtunkhwa Chief Minister Mahmood Khan has taken notice of the incident and instructed the inspector-general to immediately arrest the perpetrators.
Attacks on religious persons is highly condemnable. The culprits can't escape the law, he said, directing hospitals to ensure the best medical assistance to the injured priest.
In 2013, All Saints Church was the heart of what is called the deadliest attack on Christians in Pakistan. Nearly 127 people had died and over 250 injured in the bombing.
The outlawed Tehreek-i-Taliban Pakistan linked Jundallah group had claimed responsibility for the attack.