Sunday's presidential election in Ukraine will deepen political divisions in the country if there is no end to hostilities and a "road map" to end the crisis is not implemented, a senior Russian official was quoted as saying on Tuesday.

• May 21, 2014

Ukrainians will vote for a new president on Sunday but the election faces disruption in eastern regions of the former Soviet republic where pro-Russian separatists have seized strategic points in several cities.

• May 20, 2014

Russian President Vladimir Putin hopes to sign a multi-billion dollar gas agreement with China during a two-day visit that kicks off on Tuesday, ending more than a decade of false starts and wrangling over a deal seen as vital to both sides.

• May 20, 2014

U.S. and euro zone data will help investors take the pulse of the global economy this week, but the crisis in Ukraine threatens to spoil any improvement.

• May 19, 2014

Russia's Gazprom assured European customers it would continue to supply their gas, after its threat to halts supplies to transit nation Ukraine next month over non-payment.

• May 17, 2014

The West should impose tougher sanctions on Russia, which is waging a "hidden war" in eastern Ukraine, Ukraine's acting Foreign Minister Andriy Deshchytsia said in an interview with German newspaper Die Welt.

• May 17, 2014

He is a man with three names, sought by Ukrainian intelligence as the top Russian operative in the separatist east. He moves through the streets in a black Mercedes, his face with pencil moustache hidden behind tinted windows, and his aim is to "destroy" Ukrainian forces that venture onto his territory.

• May 15, 2014

Seventy years after their families' mass deportation under Soviet leader Josef Stalin, the Crimean Tatars are in a quandary: should they cooperate with their homeland's new Russian authorities or resist them?

• May 15, 2014