Canada, the U.S., and EU imposed sweeping sanctions on Friday over Russia's actions against Ukraine, including its 2018 attack on Ukrainian ships and annexation of Crimea.

In an interview with Global News, Ukrainian ambassador Andriy Shevchenko said the West should not hesitate in laying down a fresh round of sanctions against Russia.

The group is heading to Ukraine as part of Operation Unifier, which saw the Canadian government start sending troops there in summer 2015.

Some 200 soldiers from Edmonton's PPCLI are preparing to deploy to war-torn Ukraine, where they might only end up staying for a month.

The United States on Tuesday blacklisted seven people and eight companies and government enterprises over Russia's annexation of Crimea.

A notorious warlord has been killed in a bombing in the rebel stronghold of Donetsk, separatist officials said.

A Dutch-led criminal investigation into the 2014 downing of Malaysia Airlines flight MH17 said Wednesday investigators have solid evidence the jet was shot down by a Buk missile that was moved into eastern Ukraine from Russia.

Ukrainian President Petro Poroshenko said on Thursday he did not rule out introducing martial law and a new wave of military mobilization if the conflict with pro-Russian separatists worsened.

About 30 Canadian Forces' personnel flew out of Edmonton on their way to Ukraine Thursday morning as part of Operation UNIFIER.

Russia's gas monopolist says it will resume selling gas to Ukraine, following an official request from Kyiv.