Xinhua world news summary at 0100GMT, July 20

New York billionaire Donald Trump clinched enough delegate votes to be officially selected as Republican presidential nominee Tuesday evening in the roll call voting at the ongoing Republican National Convention.

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PYONGYANG -- Top leader of the Democratic People's Republic of Korea (DPRK) Kim Jong Un has guided a test firing of a ballistic rocket of the Hwasong artillery units of the strategic force of the military, the official news agency KCNA reported Wednesday.

The test-firing was conducted under simulated conditions of launching preemptive strikes at the ports and airfields in South Korea where the U.S. nuclear hardware is to be mobilized, the KCNA said.

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WASHINGTON -- The United States on Tuesday expanded its challenge at the World Trade Organization (WTO) to China's export restraints on key raw materials.

It requested consultation with China on the country's export duties on chromium, as well as China's export quotas on antimony, indium, magnesia, talc and tin, said the Office of the U.S. Trade Representative (USTR).

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WASHINGTON -- U.S. President Barack Obama on Tuesday strongly condemned last week's coup attempt in Turkey to violently remove the civilian government.

Speaking by phone with Turkish President Recep Tayyip Erdogan, Obama also expressed his support for Turkish democracy and lauded the Turkish people's resolve against the violent intervention and their commitment to democracy, the White House said in a statement.

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LISBON -- Europe needs to beef up measures against terrorism, French President Francois Hollande warned here during an official visit to Lisbon on Tuesday.

"In the framework of this new impulse we intend to give to the European construction, the first priority is protection, defense and security of our borders," he said in a joint press conference with Portuguese President Marcelo Rebelo de Sousa at the presidential palace in Belem.

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CLEVELAND, the United States -- Local police Tuesday refuted an earlier report of shots fired at a police vehicle near the Republican National Convention venue where Donald Trump would formally be nominated as the party's presidential nominee.

"There were no shots fired on any of our police transport vehicles right now near the Quicken Loans Arena," said the Cleveland Police's Joint Information Center for the convention in a statement, referring to the main venue for this year's GOP convention.

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London -- U.S. Secretary of State John Kerry said here on Tuesday that he wants to reaffirm the special and unbreakable ties uniting the United States and Britain, as he visited London for the first time after Britain's vote to leave the European Union.

"The United States of America depends on a strong United Kingdom. We mean united and it depends on an engaged United Kingdom," Kerry told a joint press conference with his newly-appointed British counterpart Boris Johnson in London.

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LONDON -- Jeremy Corbyn, leader of Britain's main opposition Labour Party, is to face just one challenger for his job, after the withdrawal of British MP Angela Eagle on Tuesday.

The decision of Eagle left rival Owen Smith as the sole challenger to take on Corbyn.

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PARIS -- The French government on Tuesday proposed to extend the period of the state of emergency by three months in the wake of Nice attack.

In a press release issued after a cabinet meeting, the government, dogged by rising critics over security failure, asked for an three-month extension of emergency rules "following Nice attack on July 14 and the extremely high level of terrorist threat in France." Endi