India, Feb. 7 -- The Islamic State (IS) terror group has claimed responsibility for the suicide blast at a mosque in Pakistan's capital, Islamabad, that left at least 69 people dead on Friday, according to media reports.

IS said one of its militants targeted the congregation, detonating an explosive vest and "inflicting a large number of deaths and injuries," the SITE Intelligence Group, which monitors jihadist communications, told The Japan Times.

Pakistani media reported that the attacker set off the explosives at the main gate of the shrine after approaching the congregation. The powerful blast caused extensive damage to the entrance and nearby buildings, shattering windows and scattering debris across the road.

Prime Minister Shehb...