Xinhua world news summary at 1530 GMT, April 28

MOSCOW -- Russian President Vladimir Putin on Monday announced a three-day truce starting from midnight May 8 (2100 GMT May 7).

The Kremlin said that Putin had ordered a full cessation of hostilities to mark the 80th anniversary of Russia's Victory Day, which falls on May 9. (Russia-Ukraine-Truce)

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SANAA -- The death toll from Monday's U.S. airstrikes on a detention center in northern Yemen has risen to 68, with 47 injured, reported the Houthi-run Al-Masirah TV.

The Houthis, who control much of northern Yemen, said all the victims are illegal African migrants held in the detention center in Saada, the capital city of the namesake Saada province, in northern Yemen. (Yemen-U.S. Airstrikes-Toll)

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MADRID/LISBON -- A massive blackout left many parts of Spain and Portugal without electricity on Monday, according to local sources.

Spain's electricity grid operator, Red Electrica, confirmed widespread power outages across the country. The company said it was working to restore electricity supplies and to analyze the causes of the blackouts. (Spain-Portugal-Power Outage)

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TOKYO -- Okagi Hayashi, a 115-year-old woman recognized as Japan's oldest living person, has died from heart failure over the weekend, the Ministry of Health, Labor and Welfare announced on Monday.

Hayashi, born in September 1909, died at a hospital in her hometown of Toki, Gifu prefecture, on April 26. (Japan-Oldest-Death)

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TEHRAN -- The death toll from a massive explosion at a port in Iran's southern province of Hormozgan on Saturday has risen to 46, the official IRNA news agency reported Monday.

The explosion and the subsequent fire left more than 1,200 people wounded, of whom 138 were hospitalized, IRNA quoted Mehrdad Hassanzadeh, director general of the provincial crisis management organization, as saying. (Iran-Port Blast-Casualties) Enditem