Ukraine’s military says its forces are advancing on the strategic city of Izyum in northeastern Ukraine as part of a counteroffensive aimed at retaking areas under Russian occupation.

Meanwhile, the Biden administration said Monday it’s sending another $1 billion in military aid to Ukraine, including advanced anti-radar missiles produced by Raytheon. It’s the 18th time the U.S. has sent a package of weapons since Russia invaded Ukraine in February. The Pentagon said Monday as many as 80,000 Russian troops have been killed or injured in the fighting, though that number was impossible to verify.