Police re-captured the administrative headquarters of the eastern Ukrainian city of Donetsk and have around 68 pro-Russian protesters in custody who are being questioned over the occupation.

Ukraine has asked NATO to look at all possible ways to help it protect its territorial integrity, Foreign Minister Sergei Deshchiritsya said.

Protesters demand US action against any Russian incursion into Ukraine, in front of the White House. Credit: Reuters

The minister said he had held talks with officials from the United States and the European Union and then asked NATO for help after what Ukraine's prime minister described as Russian aggression.