KYIV, Ukraine — Ukrainian forces have withdrawn from the eastern town of Siversk as Russian troops intensified attacks along the extended frontline, Kyiv’s military reported on Tuesday.

Ukraine’s General Staff said the pullback was carried out to preserve the lives of its soldiers, while emphasizing that Ukrainian forces had inflicted heavy losses on Russian troops.

“The invaders were able to advance due to a significant numerical advantage and constant pressure from small assault groups in difficult weather conditions,” the statement added.

The withdrawal highlights the growing pressure on Ukrainian positions in the east as Russia continues to step up its battlefield offensive, according to the Kyiv military statement.