A nighttime Russian attack destroyed train tracks and rolling stock in Ukraine’s northeastern Kharkiv region, officials said Friday, and authorities organized the evacuation of children from the area that is being pummeled by the Kremlin’s forces in a powerful new offensive.

The overnight strike also damaged buildings and freight cars, according to Ukraine’s national railway operator Ukrzaliznytsia. No injuries were reported.

Authorities have evacuated more than 11,000 people from the Kharkiv region since Russia launched an offensive there on May 10, regional Gov. Oleh Syniehubov said. Officials on Friday announced the mandatory evacuation over the next 60 days of 123 orphans and children living without their parents in the area.