A shoot-out has erupted at a shopping mall in the centre of Donetsk, the Ukrainian stronghold of pro-Russia rebels, according to reports.
A Reuters reporter said up to six rebel gunmen were hiding behind cars in the mall's car park, firing at another group of people.
It comes as Russian president Vladimir Putin has agreed to meet Ukrainian president Petro Poroshenko on August 26, along with representatives from the European commission and the Eurasian Customers Union.
Poroshenko confirmed that "stabilising the situation" in eastern Ukraine would be on the agenda.
More than 2,000 people have died in clashes between the pro-Moscow rebels and forces from Kiev.
More top news
Clear spells in the north overnight where it's actually cold enough in the north for a touch of ground frost. Further south cloudier.
Grange Hill actor Terry Sue-Patt, who played Benny Green in the long-running school-based drama, has been found dead at his home in London.
EastEnders fans have finally been introduced to the character Fat Elvis, years after he was first mentioned.