Russian President Vladimir Putin met with Andrei Troshev, a former top commander of the Wagner mercenary group, on Friday to discuss how best to use "volunteer units" in the Ukraine war.

The meeting underscores the Kremlin's attempt to show that the state has now gained control over the mercenary group after a failed June mutiny by its boss Yevgeny Prigozhin, who was then killed with other senior commanders in a plane crash in August.

Putin was shown on state television meeting at the Kremlin with Troshev, a former Wagner commander known by his nom de guerre "Sedoi" - or "grey hair".

The Kremlin said the meeting took place late on Thursday.

Deputy Defence Minister Yunus-Bek Yevkurov, who has travelled over recent months to several countries where Wagner mercenaries have worked, was also present, sitting closest to Putin.

Addressing Troshev, Putin said that they had spoken about "volunteer units that can perform various combat tasks, above all, of course, in the zone of the special military operation."

"You yourself have been fighting in such a unit for more than a year," Putin said. "You know what it is, how it is done, you know about the issues that need to be resolved in advance so that the combat work goes in the best and most successful way."

Putin also said he wanted to speak about social support for those involved in the fighting.

Troshev was shown listening to Putin, leaning forward and nodding, pencil in hand. His remarks were not shown.

Kremlin spokesman Dmitry Peskov told the RIA news agency that Troshev now worked at the defence ministry.

The fate of Wagner has been unclear since Prigozhin's failed June 23 mutiny and his death on Aug. 23, after which Putin ordered Wagner fighters to sign an oath of allegiance to the Russian state, which Prigozhin and many of his men had opposed.

Russia's Kommersant newspaper has reported that just days after the Wagner mutiny Putin had suggested that Troshev take over from Prigozhin.

Wagner's return?

The Putin meeting in the Kremlin appears to indicate that what remains of Wagner will now be overseen by Troshev and Yevkurov.

Wagner, which once had tens of thousands of men, became best known for its May capture of the Ukrainian city of Bakhmut in the bloodiest battle of the war. After Bakhmut's fall, Wagner units withdrew from Ukraine.

Some of the Wagner fighters have signed up for service with the formal Russian army while many others have moved into different private military companies (PMCs), Russian sources have told Reuters.

British military intelligence said that up to hundreds of fighters formerly associated with Wagner have likely started to redeploy to Ukraine as part of a variety of different units.

"The exact status of the redeploying personnel is unclear, but it is likely individuals have transferred to parts of the official Russian Ministry of Defence forces and other PMCs," British military intelligence said.

Troshev, a decorated veteran of Russia's wars in Afghanistan and Chechnya and a former commander in the SOBR interior ministry rapid reaction force, is from St. Petersburg, Putin's home town, and has been pictured with the president.

He was awarded Russia's highest medal, Hero of Russia, in 2016 for the storming of Palmyra in Syria against Islamic State militants.