Militants took a photo of themselves before they took over a government building.

Throughout Sunday militants equipped with Russian weapons, wearing the same uniforms as the soldiers which occupied Crimea, have been taking over police stations, government buildings, and secret service buildings.

There has been little reaction from the Ukrainian authorities and police in many cities are nowhere to be seen.

In the absence of law and order, clashes between pro-Ukrainians and pro-Russians have erupted in many places. Casualties have been reported, although not confirmed.

Radio Free Europe is providing a live feed of these shocking and historic events: