Ukraine imposes martial law after Russia seizes naval ships

Ukraine on Monday imposed martial law for 30 days in parts of the country most vulnerable to an attack from Russia after president Petro Poroshenkowarned of the “extremely serious” threat of a land invasion.

Mr Poroshenko said martial law was necessary to bolster Ukraine’s defences after Russia seized three Ukrainian naval ships and took their crews prisoner at the weekend.

Parliament approved the introduction of martial law after Mr Poroshenko reassured some sceptical lawmakers that it…