Jack Detsch
NEW: Russia has about 2,000 troops left in Ukraine's besieged city of Mariupol: senior U.S. defense official. Most of the 10 Russian battalion tactical groups previously in Mariupol have moved north of the city, but are stalled to refit for Donbas fight.
NEW: Russia has about 2,000 troops left in Ukraine's besieged city of Mariupol: senior U.S. defense official. Most of the 10 Russian battalion tactical groups previously in Mariupol have moved north of the city, but are stalled to refit for Donbas fight.
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