Volodymyr Zelensky says Russia has 50,000 troops in Kursk
www.bbc.com
Ukraine's president says the incursion is limiting the forces Moscow can deploy inside his country.

According to the Institute for the Study of War, a US non-profit, Russia had 11,000 troops in Kursk when Ukraine began its shock incursion in early August. However, a report in the New York Times suggests Moscow has achieved its troop build-up in Kursk without any need to pull its soldiers out of Ukraine.