Xinhua world news summary at 1530 GMT, April 22

WASHINGTON -- Police are searching for a naked gunman after four people were shot dead and at least three wounded at a Waffle House in the southern U.S. state Tennessee early Sunday.

Two of those who died were fatally shot in the parking lot outside the restaurant near Nashville, and one inside, the Metropolitan Nashville Police Department said. (US-Shooting-Gunman)

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BAGHDAD -- Up to 36 Islamic State (IS) militants were killed in airstrikes by Iraqi air force targeting IS positions inside neighboring Syria, the Iraqi military said on Sunday.

Acting on intelligence reports, the Iraqi F-16 fighter jets pounded the terrorist IS positions, including a meeting site for some IS leaders, leaving 36 terrorists dead, a statement by the Iraqi Joint Operations Command said. (Iraq-Syria-IS)

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KABUL -- The death toll from a suicide attack in Afghan capital of Kabul has risen to 52 with 112 others wounded, a spokesman of the Public Health Ministry said on Sunday.

The blast occurred when the bomber blew himself up among a crowd lining up to get access to an election-related registration site in a local school Sunday morning, spokesman Waheed Majroh tweeted. (Afghanistan-Bomb Attack)

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BUJUMBURA -- Two people were killed and at least 35 others injured in a grenade explosion Saturday night in northern Burundi, a police spokesman said Sunday.

The grenade attack happened at a business center at Gasenyi village, in Gahombo district in Kayanza Province, Burundian Police Spokesman Pierre Nkurikiye told a press conference in Bujumbura, capital city of Burundi. (Burundi-Grenade Blast)

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YEREVAN -- Opposition member of parliament (MP) Nikol Pashinyan, who has been leading protests that gripped Armenia's capital, has been detained, the country's police said Sunday.

He was detained along with other fellow MPs, said a statement released by the police, for carrying out "an illegal protest march." (Armenia-Detain-Pashinyan) Enditem