Xinhua world news summary at 1530 GMT, May 1

At least two soldiers were killed and eight civilians injured in a bomb blast Sunday at a livestock market in Lower Shabelle region, southern Somalia.

"Two soldiers were killed in the explosion. Five other soldiers and three civilians were wounded," local officials said. No group has yet claimed responsibility for the explosion. (Somalia-Bomb)

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BAGHDAD -- Up to 33 people were killed and some 63 others wounded Sunday when two car bombs went off in the town of Samawa, the capital of Muthanna province, a security source said.

The attacks occurred around noon when one booby-trapped car parking near the provincial government compound detonated, while another car bomb ripped through a busy parking lot in al-Sharji district in downtown Samawa, some 270 km south of the Iraqi capital of Baghdad, the source said. (Iraq-Bomb)

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ST. PETERSBURG -- One people was killed and four others injured Sunday when an explosion occurred at a bus stop in the Russian city of St. Petersburg, local media reported. (Russia-Blast)

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WASHINGTON -- A freight train derailed Sunday morning near a metro station in northeastern Washington D.C., leaving several cars overturned and leading to a leak of hazardous substance. (US-Train-Derailment-Washington)

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HOUSTON -- Six people, including a 64-year-old woman and her four grandchildren, were found dead Saturday after severe storms triggered flooding in Palestine, a city in the eastern part of the U.S. state of Texas on Friday night. (US-Houston-Flood) Endi