The trip is the second alleged inspection of Moscow's troops in Ukraine and comes less than a day after Ukrainian President Volodymyr Zelenskyy visited the US.
Amid a stalling situation in Ukraine, Moscow’s Defence Ministry has called for the number of military personnel to be increased from 1 million to 1.5 million.
A fire at an airport in Kursk, Russia is being described as a 'terrorist' attack. It comes a day after similar strikes on two other Russian airbases, which the Kremlin blamed on Kyiv. Meanwhile Ukraine’s President visits troops in Donetsk.