(QHA) -

The foreign ministers of Ukraine, Russia, Germany, and France plan to meet in Berlin next week as part of diplomatic efforts to end the conflict in eastern Ukraine, RFE/RL reports.

The January 12 meeting was agreed in a phone call on January 9 between the four countries’ foreign ministers.

A source in the Ukrainian Foreign Ministry told Interfax news agency that the leaders of Ukraine, Russia, Germany, and France may also meet in the Kazakh capital, Astana, next week.

"If the foreign ministers reach certain agreements in Berlin on January 12, everything is possible," the source said.

Meanwhile, the Ukrainian military said four of its soldiers were killed in an upsurge in mortar and rocket attacks against army outposts.

Authorities in the rebel-held stronghold of Donetsk said two civilians died in clashes around the city's disputed airport.