Ukraine's acting President Olexander Turchynov has reinstated military conscription to deal with deteriorating security in the east of the country.
The move, announced in a decree, came as pro-Russia militants seized the regional prosecutor's office in the eastern city of Donetsk.
Ukraine blames Russia for organising the seizures of a number of offices in the east, a claim Moscow denies.
Some 40,000 Russian troops are stationed near the Ukrainian border.
Read more