A lawyer, who was present in the courtroom when the incident happened, said that a case had been registered against the deceased under blasphemy laws. The accused was brought to court from Peshawar Central Jail, reports Dawn News.

"During the hearing of the case, the complainant said that the accused was an Ahmadi and asked him to recite the Kalima-e-Tayyaba," she told Dawn News, adding that the complainant then fired at the elderly man and killed him.

It is still not clear how to enter the high security court area.

The attacker was arrested.

Peshawar Capital City Police Officer (CCPO) Mohammad Ali Gandapur and SSP (operations) Mansoor Aman visited the courtroom where the man was killed, reports the newspaper.

"At the moment we have little information but we have started investigation into the killing," the CCPO told Dawn News.

The weapon has been seized.

The body of the deceased has been shifted to Khyber Medical University for post-mortem.

Police had registered an FIR against the deceased in 2018.

According to the FIR, a copy of which is available with Dawn.com, the complainant alleged that the deceased belong to the Ahmadi community and "befriended him on Facebook" and in subsequent conversations, claimed that he was the "fourteenth Mujaddid".

"He then invited me to have a discussion with him at a mall in the city where he started talking about his belief," the complainant said in the FIR, going on to make more allegations.

The deceased was charged under Section 153-A (promoting enmity between different groups), section 295-A (deliberate and malicious acts intended to outrage religious feelings of any class by insulting its religion or religious beliefs), Section 295-B (defiling etc. of the Holy Quran), Section 295-C (use of derogatory remarks against Prophet Muhammad PBUH) and Section 298 (uttering words etc., with deliberate intent to wound religious feelings) of the Pakistan Penal Code.