Russia’s airplanes and artillery widened their assault on Ukraine on Friday, striking airfields in the west and a major industrial hub in the east, as Moscow’s forces tried to regroup from recent losses and their onslaught fast reduced crowded cities to rubble.

New commercial satellite images appeared to capture artillery firing on residential areas between Russian forces and the capital. The images from Maxar Technologies showed muzzle flashes and smoke from the big guns, as well as impact craters and burning homes in the town of Moschun, outside Kyiv, the company said.

Meanwhile, Ukraine’s Deputy Prime Minister Iryna Vereshchuk said just nine of 14 agreed-upon corridors were open on Saturday, and that about 13,000 people were evacuated on them around the country. At least 2.5 million people have fled Ukraine since the Russian invasion 17 days ago, according to the United Nations Refugee Agency.