KIEV, Sept. 23 - The European Commission will propose that Russia and Ukraine sign an interim gas agreement in Berlin as a step towards resolving their long-standing row over gas prices, Energy Commissioner Guenther Oettinger said on Tuesday, Reuters reported.

Russian, Ukrainian and EC officials are meeting on Sept. 26.

Ukraine's military, reporting progress on a ceasefire called by President Petro Poroshenko, said on Tuesday all firing stopped overnight in a conflict with pro-Russian separatists that has killed more than 3,000 people and sent relations between the two countries to an all-time low.