An eyewitness says a several grenades were thrown as worshippers performed the last sajda.
The eyewitness also claims that the attackers were dressed in FC uniforms.
At least 20 people have been reportedly injured in the blast.
According to SSP operations, one of the explosions took place near a mosque.
Express News correspondent Yasir Ali says one of the blasts took place inside Imamia Masjid, shortly after the Friday prayers came to an end.
Further, according to Express News, firing can be heard at the site of the blast.
The injured are being shifted to a hospital nearby, and the area has been cordoned.
The nature of the blast has not yet been ascertained.
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