Xinhua world news summary at 0030 GMT, May 30

Researchers at Stanford Linear Accelerator Center (SLAC) have made the first microscopic movies of liquids getting vaporized by the world' s brightest X-ray laser.

The movies, recorded at SLAC National Accelerator Laboratory, a facility of the U.S. Department of Energy, have raised expectations that details revealed in the footage could give researchers more control in X-ray laser experiments. (Stanford-Microscopic movies)

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UNITED NATIONS -- The UN Children's Fund (UNICEF) on Sunday expressed alarm at the number of migrant and refugee deaths in the past week in the Central Mediterranean, many of whom were believed to be unaccompanied minors.

In anticipation of a major summer upswing of child migrants using the dangerous crossing between Libya and Italy, UNICEF will shortly begin an operation with the Italian government and partners to provide protection support, the UN agency said in a press release. (UNICEF-Refugee)

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JERUSALEM -- A vote to approve Israeli hard-liner, Avigdor Lieberman, as defense minister was put off on Sunday night, amidst disputes in Prime Minister Benjamin Netanyahu's newly-expanded right-wing coalition.

Israeli media reported that the vote on the controversial appointment was put off to the cabinet meeting on Tuesday. (Israel-Defense Minister)

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DAMASCUS -- Muhammad Alloush, the chief negotiator of the opposition's Higher Negotiation Committees (HNC), resigned Sunday from his post, according to the Al-Arabiyah TV.

In a phone call with the Saudi-funded TV, Alloush said he will no longer be the lead negotiator at the Geneva peace talks apparently over frustration from the lack of progress in the talks. (Geneva-Peace talks) Endi