Crowds are reportedly gathering in Donetsk in eastern Ukraine for a pro-Ukraine rally; estimates range from hundreds of people up to about 5,000. The action comes after Ukrainian forces clashed with pro-Russian separatists in the city of Mariupol, killing three militants and wounding 13. Ukraine is trying to restore order in the east, where officials say Russian special operatives are helping local separatists.

This appears to be a live stream of the rally:

Live streaming video by Ustream

Here are updates from some people who appear to be in Donetsk:

Petr Shelomovskiy identifies as a freelance photographer.

Paul Sonne is the Moscow correspondent for the Wall Street Journal.

@Kateryna_Kruk identifies as being with the Euromaidan movement, the pro-Europe push that began demonstrating in Kiev in November.

Max Seddon works for Buzzfeed.