Russia said on Wednesday that a total of 959 Ukrainian fighters, including 80 wounded, had surrendered from the bunkers and tunnels below Mariupol's Azovstal steelworks since Monday.
The defence ministry said 694 Ukrainian fighters - including members of the Azov regiment - had surrendered in the past 24 hours, including 29 wounded.
In the latest update on what Moscow calls its special military operation, the ministry said Russia also struck eastern Ukraine with missiles in the Soledar area of the Donetsk region.
Russia also hit foreign mercenaries, destroyed Ukrainian Su-24 aircraft, Ukrainian arsenals and S-300 anti-aircraft missile systems, the ministry said.
Russia struck 76 control points and 421 troop and artillery points, including 147 artillery and mortar, with missiles and artillery, the ministry said.
It hit a Ukrainian battery of 155-mm M777 howitzers manufactured by the United States, the ministry said.
It was not possible to independently confirm the claims.
(Reporting by Reuters; editing by Guy Faulconbridge)