Ukraine’s parliament has voted to bring in martial law, after Russia seized three of its naval vessels and 23 crew members on November 25.
The ships were sailing off the coast of Crimea, which was annexed by Russia in 2014, when they were captured.
Russia opened fire, before its special forces stormed the vessels. Between three and six Ukrainians were injured.
Ukraine said it was an “act of aggression” from Russia. However, Moscow said the ships had illegally entered its waters.
On November 26, Ukrainian President Petro Poroshenko said he was proposing that parliament back a 30-day martial law – half the length of that recommended by the country’s security and defense council.
President Poroshenko said he did not want the measure to affect presidential elections set for March 31, 2019.
The Sea of Azov on November 25 clash is the first time Russia and Ukraine have come into open conflict in recent years, although Ukrainian forces have been fighting Russian-backed separatists and Russia volunteers in the east since 2014.
A number of Western countries condemned Russia’s actions.
In New York, the UN Security Council met to discuss the crisis – but failed to agree a Russian-proposed agenda amid sharp disagreements between Moscow and the West.