Reuters World News Summary

Five people were killed in a shooting late on Saturday in Switzerland including the gunman, who knew his victims and was related to some of them, police told a news conference on Sunday. The shooting took place in Wuerenlingen, a community of some 4,500 people north-west of Zurich.

Polish President Komorowski front-runner in election

Poland voted in the first round of a presidential election on Sunday that opinion polls show will send front-runner and incumbent Bronislaw Komorowski into a runoff against a conservative opposition challenger. A comfortable re-election for Komorowski would give a confidence boost to his allies in the centre-right Polish government, who face what will be a tightly fought race for another term later this year.

'Winner takes all' vote system exaggerates Britain's divisions

David Cameron can thank Britain's winner-takes-all voting system for handing him an outright majority in parliament on just 37 percent of the vote. But by boosting the power of Scottish nationalists, it has also intensified one of his biggest headaches. The results of Thursday's election highlight more starkly than ever the anomalies of a system that allocates seats not according to the parties' total number of nationwide votes but on the basis of 650 local 'first-past-the-post' contests.

Special Report: Russian soldiers quit over Ukraine

Some Russian soldiers are quitting the army because of the conflict in Ukraine, several soldiers and human rights activists have told Reuters. Their accounts call into question the Kremlin's continued assertions that no Russian soldiers have been sent to Ukraine, and that any Russians fighting alongside rebels there are volunteers. Evidence for Russians fighting in Ukraine - Russian army equipment found in the country, testimony from soldiers' families and from Ukrainians who say they were captured by Russian paratroopers - is abundant. Associates of Boris Nemtsov, a prominent Kremlin critic killed in February, will soon publish a report which they say will contain new evidence of the Russian military presence in Ukraine.

Houthis accept five-day truce in Yemen proposed by Saudi Arabia

Yemen's dominant Houthi group accepted on Sunday a five-day humanitarian ceasefire proposed by its adversary Saudi Arabia but said it would respond to any violations of the pause. Neighboring Saudi Arabia had said on Friday that the ceasefire could begin on Tuesday if the Iranian-allied militia agreed to the pause, which would let in badly needed food and medical supplies.

No respite for candy factory caught up in Russia-Ukraine crisis

The fortunes of the Russian outpost of Ukrainian President Petro Poroshenko's candy empire have ebbed and flowed with the Russian-backed separatist conflict in the east of his country. If the factory turning out toffees and jellied sweets in the southwestern town of Lipetsk is a bellwether for the direction of relations between Moscow and Kiev, things do not look good.

Sixth policeman dies after gun battle in Macedonia

Sporadic gunfire could be heard in an ethnic Albanian suburb of northern Macedonia on Sunday, after a day-long gun battle between police and an 'armed group' killed six policemen and wounded about 30. The Interior Ministry said a sixth policeman had died overnight in hospital. It said an unspecified number of gunmen were killed but gave no information on civilian casualties during the clashes that began in the town of Kumanovo, 40 km (25 miles) north of the capital Skopje, early on Saturday.

East African leaders seek to break political deadlock in Burundi

East African leaders will hold a summit in Tanzania on May 13 aimed at breaking the political deadlock in Burundi and ensuring the country holds peaceful elections, Tanzania's presidency said. Nineteen people have been killed in protests against President Pierre Nkurunziza's bid for a third term, which opponents say violates the constitution and the peace deal that ended the civil war in 2005.

New face but same old problems for EU foreign policy

Europe's chequered attempt to build a common foreign and security policy has a new face, Italy's Federica Mogherini, but the European Union is stuck with the same old problems despite her bright start. In her first six months as EU foreign policy chief, the 41-year-old former Italian foreign minister has tried to harness Europe's soft power and diplomacy more effectively and initiated a review of the bloc's outdated security strategy and of its flawed "neighborhood policy".

North Korea boasts of firing ballistic missile from submarine

North Korea said on Saturday it had successfully test-fired a ballistic missile from a submarine, a step that would mark significant progress in the secretive state's military capabilities. It could pose a new threat to South Korea, Japan and the United States, which have tried to contain North Korea's growing nuclear and missile strength, military experts said.