Conscripts and reservists in all regions will be called up, according to the decree published by the Ukrainian presidency, which is to be in effect for 90 days.

Zelensky ordered the General Staff to work out how many servicemen will be called up and in which order.

Invading Russian forces pressed deep into Ukraine on Thursday as deadly battles reached the outskirts of Kyiv and the West responded with punishing sanctions.

Russian missiles and shelling rained down on Ukrainian cities after President Vladimir Putin unleashed a full-scale ground invasion and air assault, forcing civilians to shelter on metro systems, with 100,000 people displaced.