There is obviously a somewhat coordinated operation going on in Donetsk oblast in east Ukraine. The province is famous for its mines and heavy industry. With some 4.7 million inhabitants it constitutes 10% of the Ukrainian population. Some action by anti coup-government groups were also seen in the neighboring Luhansk (Donbas) and Kharkiv oblast but Donetsk oblast is for now the schwerpunkt.

Over the last days people in Donetsk city had occupied several government buildings and barricaded them. The Alfa police units, SWAT operators, sent to kick them out allegedly refused to do so. A 48 hour coup-government ultimatum to clear the buildings was not followed up on. It is possible that the coup-government has found no loyal force that would do its bidding.
Today several other cities in Donetsk oblast also saw extensive movements of anti coup-government groups. In Sloviansk some para-military group, some of them somewhat trained (video), broke into the main police station and raised the Russian flag. They allegedly handed out weapons to other protesters. The mayor of Sloviansk had announced her pro-Russian stand. Around the city street checkpoints of pro-Russian militia, pictures show some mid aged men, went up. Many of these people are said to be miners from the large Donetsk coal mines. They are on the look out for incoming military and police traffic from Kiev. Trained people from the Berkut riot police, dissolved by the coup-government, have joined the protesters.
In Mariupol and Druzhkovka protesters have blocked or seized the local city administration. Police in Kramatorskaya joined the protesters there. The city of Luhansk, where there are also protests, and Donetsk were today at least once buzzed by military planes.
If have seen no Donetsk pictures yet of “polite green men”, i.e. Russian military operators, like those seen in Crimea. The militia people occupying buildings in Donetsk oblast also seem to be less equipped than the local self-defense groups that could be seen in Crimea. While this operation in several Donetsk cities today seems somewhat coordinated there is no hint yet that Russia is behind this.
The coup-government in Kiev has done its best to alienate the people in the east. From denigrating their Russian language to threatening them with genocide like the gas-princess Tymochenko has done. The economic situation in the east is bad and has, unlike the neighboring provinces in Russia, not recovered throughout the last twenty years. Under the new government the economic situation will likely get worse. These people are unlikely to need lectures from Russia to understand that there are better deals to have than the ones Kiev and the IMF are offering.
Should the coup-government in Kiev find some loyal force that is willing to suppress the mass movement in the east there will be severe fighting and Russia will probably step in. But I still find that quite unlikely. Russia, like Henry Kissinger, has argued for a neutral and strongly federalized Ukraine. The people in Donetsk could probably agree with staying in Ukraine if they get strong autonomy.
The coup-government in Kiev can not risk a fight and a possible Russian intervention which could end with the loss of the industrial heart of Ukraine. It will have to give in to the demand of the people. Unfortunately some blustering coming from the “west”, especially for the U.S. and NATO, may encourage some idiotic moves from Kiev before reason sets in.