DawnNews reported that officials confirmed more than nine bodies have been shifted to the hospital.
Operations said that it was a suicide blast in which policemen were targeted. And it could be a suicide attack police said that they are investigating the area.
A witness, who was in the building at the time of the explosion, said that she heard a loud noise and saw smoke coming out of a van.
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Some prisoners have been held in administrative detention for up to 11 years without any charges brought against them. Three Palestinians were killed in the clashes with Israeli security forces that ensued, and hundreds were injured.
According to Dawn News, the three killed were anti-riot policemen.
Prime Minister Nawaz Sharif has expressed sorrow over the loss of precious lives in the blast.
Blast destroyed many families, but terrorists can never destroy our resolve.
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Earlier Thursday, the district attorney said he was encouraged by the pace of the investigation he called "massive" in scope. The confession comes after investigators arrested and jailed DiNardo on charges he tried to sell one of the victim's cars.
Blood-soaked caps, shoes, pieces of clothes and human flesh lay strewn across the blast site, as paramilitary rangers were called in to join the rescue effort.
Emergency was declared in the city hospitals and people were appealed to donate blood. "It was a deafening blast, which shook the entire Arfa Karim Towers", Dil told AFP. "The condition of several injures is stated to be critical" said an official.
The area where the blast took place is supposed to be one of the most secure neighbourhoods of Lahore, just 100 metres from the Chief Minister office.
But the country was hit by a wave of attacks in February this year, including a bomb that killed 14 people in Lahore.
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Both India and Pakistan control portions of Kashmir , though both nations stake a claim to the entire region. He said diplomatic channels would continue to be used for a resolution of the Dokalam stand-off.
Lahore has so often been the theatre of bloody attacks protested in the past, but they have declined in recent years, while the security situation in Pakistan has improved globally.