Ukrainian President Volodymyr Zelensky has made an unannounced visit to the front-line city of Bakhmut, where Ukrainian and Russian forces have fought a fierce, months-long battle.
He met troops and handed out awards to soldiers, the presidency said.
For months, Bakhmut has been a key target for Russian forces in the Donetsk region, and has been extremely badly damaged.
However, Ukrainian forces have been able to hold back the advance.
The visit is a significant show of defiance – and a demonstration of support for Ukrainian forces engaged in some of the fiercest battles in recent weeks.
His trip will be compared with recent public appearances by the Russian President Vladimir Putin – who on Monday travelled to Minsk for the first time in more than three years to meet Belarusian President
Alexander Lukashenko, a long-time ally.
The two leaders spoke of increasing military co-operation, amid talk of a growing threat of another potential attack on Ukraine from Belarusian territory. In last February’s invasion, some Russian units attacked Ukraine from the north through Belarus.