Ukraine retook an airfield in the eastern Donetsk region yesterday after fighting with pro-Russian militias.
Ukrainian forces have also apparently surrounded the town of Slaviansk, which had been seized by the militias. In total, the separatists have taken over government and police buildings in up to 10 towns and cities in eastern Ukraine.
Ukraine's action has prompted Vladimir Putin to describe the country as being on the "brink of civil war;" it has also come ahead of talks tomorrow between senior diplomats from Russia, the EU, the U.S. and Ukraine.
Russia's Micex is -0.1%, while the USD-RUB is -0.4% at 36.095.