A deadly Russian airstrike attacked a Ukrainian military base Yavoriv near the Polish border, local officials said.
At least 35 people were killed in the attack near NATO border, Governor of Ukraine’s Lviv region said.
Thirty Russian cruise missiles were fired at the military training base, Ukraine’s military said.
The military training facility, the biggest in the western part of the country and traditionally the site of joint drills with NATO, which is located less than 25 km (15 miles) from the Polish border.
War entered its 18th day as the UK’s Ministry of Defence said Russia was advancing but at the cost of suffering heavy losses.