The Ukrainian military says that fighting between government troops and Russia-backed separatists has intensified in eastern Ukraine.
Syrian rebels are battling both fighters of the Islamic State (IS) militant group and, separately, government soldiers as they try to hold on to strongholds in the north of the country near Aleppo.
The head of the Catholic Church spoke as he met with hundreds of children on May 28, including a migrant boy from Nigeria whose parents drowned in a shipwreck in an effort to reach Italy.
Russian President Vladimir Putin vowed to build closer relations with Greece as he wrapped up a two-day trip to the EU state by visiting the monastic community of Mount Athos, one of Orthodox Christianity's holiest sites.
The International Olympics Committee (IOC) has informed Russia that retests from eight Russian athletes at the 2012 Olympics in London have shown positive for doping.
Dozens of alleged Islamic State militants have been killed by air strikes and Turkish artillery fire, Turkish media are reporting.
At least 45 migrants died and dozens more were missing after their boats capsized in the Mediterranean Sea on May 27, the Italian coastguard said.
Pakistan's prime minister will undergo open-heart surgery next week, his family has announced.
Former NATO Secretary-General Anders Fogh Rasmussen says he will do his "utmost to promote security, economic reforms, and stronger EU ties" in his new capacity as an adviser to Ukrainian President Petro Poroshenko.
Saudi Arabia and Iran failed to reach a deal on arrangements for Iranians to attend this year's Hajj pilgrimage to Mecca, with officials from both countries blaming the other for the impasse.
The new Iranian parliament that was formed from elections held in February and April has been sworn in at its opening session in Tehran.
A suggestion that men should be allowed to "lightly beat" their wives from an Islamic religious body was met with outrage in Pakistan on May 27.