Xinhua world news summary at 1530 GMT, May 6

The de-escalation zones deal went into effect in Syria at midnight Saturday, local al-Watan online newspaper reported.

The deal was signed by Russia, Iran and Turkey on Thursday, said the report. (Syria-Deal)

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CARACAS -- Venezuela confirmed Friday the death of a 20-year-old man during an opposition protest not far from the capital city Caracas, bringing the death toll to 37 since the protest broke out early April.

According to a statement of the prosecutor-general's office, Hecder Lugo was found "wounded by a gun shot" on Thursday in a protest that took place in San Diego in northern Carabobo State, which is about two hours by car from Caracas. (Venezuela-Protests-Deaths)

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ARUSHA, Tanzania -- At least 31 people, including pupils and three teachers, were killed after a school bus plunged into a gorge in Tanzania on Saturday morning, authorities said.

The accident involved pupils and three teachers of the Lucky Vincent English Medium Primary School located on the outskirts of northern Tanzania's safari capital of Arusha. (Tanzania-School bus crash)

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MANILA -- Two people were killed and four others injured, including a policeman, in twin blasts that rocked Quiapo District in Manila on Saturday, police said.

The first explosion went off around 5:50 p.m. local time (0950 GMT) in Norzagaray Street in Quiapo District, while the second blast occurred around 8:30 p.m. local time (1230 GMT) near the same site, police said. (Philippines-Blas