Sergei Shoigu

Russian President Vladimir Putin on Sunday replaced Sergei Shoigu as defence minister in a Cabinet shakeup that comes as he begins his fifth term in office.

In line with Russian law, the entire Russian Cabinet resigned on Tuesday following Putin’s glittering inauguration in the Kremlin, and most members have been widely expected to keep their jobs, while Shoigu’s fate had appeared uncertain.

Putin signed a decree on Sunday appointing Shoigu as secretary of Russia's Security Council, the Kremlin said. The appointment was announced shortly after Putin proposed Andrei Belousov to become the country’s defence minister in place of Shoigu.

The announcement of Shoigu’s new role came as 13 people were reported dead and 20 more wounded in Russia’s border city of Belgorod, where a 10-story apartment building partially collapsed after what Russian officials said was Ukrainian shelling. Ukraine hasn’t commented on the incident.

Belousov's candidacy will need to be approved by Russia's upper house in parliament, the Federation Council. It reported Sunday that Putin introduced proposals for other Cabinet positions as well but Shoigu is the only minister on that list who is being replaced. Several other new candidates for federal ministers were proposed Saturday by Prime Minister Mikhail Mishustin, reappointed by Putin on Friday.

Shoigu's deputy, Timur Ivanov, was arrested last month on bribery charges and was ordered to remain in custody pending an official investigation. The arrest of Ivanov was widely interpreted as an attack on Shoigu and a possible precursor of his dismissal, despite his close personal ties with Putin.

Kremlin spokesman Dmitry Peskov said Sunday that Putin had decided to give the defense minister role to a civilian because the ministry should be "open to innovation and cutting-edge ideas.” He also said the increasing defense budget "must fit into the country’s wider economy,” and Belousov, who until recently served as the first deputy prime minister, is the right fit for the job.

Associated Press