Xinhua world news summary at 1600 GMT, April 5

ISTANBUL -- A researcher on Thursday shot dead four colleagues and wounded three others at the Eskisehir Osmangazi University in northwestern Turkey, Turkish media reported.

Ozdemir Cakacak, governor of Eskisehir, told reporters on the scene that the assailant, identified as Volkan Bayar, shot and killed a deputy dean, the faculty secretary and two other colleagues. (Turkey-Campus-Shooting)

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DAYANG YIHAO -- China's unmanned submersible "Hailong III" dived 4,266 meters below the sea surface in the western Pacific Ocean late Wednesday while conducting a 4,500-meter level deep water test.

The submersible entered the water from its mothership Dayang Yihao (Ocean No. 1), a Chinese scientific research ship, at 6:30 p.m. Beijing time (1030 GMT). It reached the depth of 4,266 meters some 174 minutes later, and returned to the deck of the mothership early on Thursday. (China-Submersible-Hailong III)

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WASHINGTON -- U.S. cities on Wednesday marked the 50th anniversary of Martin Luther King Jr.'s assassination, with ceremonies and reflection on how to carry forward his legacy.

At the Martin Luther King Jr. Memorial in Washington D.C., crowds gathered to commemorate the late civil rights leader with speeches and flowers. (US-MLK-Anniversary)

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YANGON -- Two women have been killed and three others injured in a landslide at a stone cave in Myanmar's central Mandalay region, the Home Affairs Ministry said on Thursday.

The landslide occurred on Wednesday due to the collapse of soil and rock of the cave near Tipinte village in Kyaukpadaung township. (Myanmar-Landslide) Enditem