Lahore: Pakistani officials have formed a joint investigation team (JIT) to investigate the suicide blast in Raiwind area of Pakistan on Wednesday, media reports said on Friday.

The attack left at least 11 people killed.

The deceased included policemen and civilians.

Raiwind is located close to Pakistan's Lahore city.

The JIT includes members of the police and intelligence agencies, Pakistan's Geo News reported.

"Moreover, on Friday, security officials completed geo-fencing of the area. Punjab Chief Minister Shehbaz Sharif also chaired a meeting on security-related issues today, where the authorities submitted the initial investigation report of the blast," the news channel further reported.

According to Pakistan's Dawn News, the suicide bomber blew himself up at the Nisar Police check-post near the Tableeghi Markaz after a cop tried to stop him from entering the venue where a bi-annual congregation was under way.

“It was at around 9:20pm when a teenage boy approached the police personnel. When a policeman tried to stop him, he blew himself up injuring all of the 12 police personnel present there,” DIG Operations Dr Haider Ashraf told Dawn, adding that five of those cops, including two sub-inspectors, later succumbed to their injuries.

TTP claimed responsibility for blast near Tableeghi Markaz congregation, Dawn News reported.

A motorcycle, which was located close to the site of the mishap, has been destroyed.

Meanwhile, United Nations Secretary-General António Guterres has condemned Wednesday’s attack at a police checkpoint near a mosque in the outskirts of Lahore.

“[Mr. Guterres] extends his condolences to the families of the victims and wishes those injured a speedy recovery,” said a statement from a UN spokesman, which said the Secretary-General calls for the perpetrators of the attack to be brought to justice.

The statement went on to say that the UN supports the efforts of the Government of Pakistan to fight terrorism with full respect for international human rights norms and obligations.