President Joe Biden said Monday the United States would not provide F-16 fighter jets to Ukraine, as Kyiv expands the list of weaponry it needs to be better able to drive Russia forces from occupied territories. Fighting continued at key points along the long front as Russian forces sought to expand their hold on territory in the Donetsk region of eastern Ukraine. The Kremlin-appointed Donetsk leader, Denis Pushilin, claimed Russian forces were advancing near Vugledar, a strategically valuable town southwest of Donetsk city. “Now we can say that units have established positions in the eastern part of Vugledar, and work is also being carried out in the vicinity,” Pushilin said, according to Russian news agencies. But Kyiv rejected the claim, while conceding that the fighting there was tough. “The enemy doesn’t count its people and, despite numerous casualties, maintains a high intensity of attacks,” Ukraine’s President Volodymyr Zelensky said late Sunday. At the White House, Biden said he was opposed to supplying American fighter jets to Ukraine. “No,” he said when asked by reporters at the White House if he was in favor of sending F-16s or others, now that the US, Germany and other countries have agreed to boost the Ukrainian arsenal by providing heavy battle tanks. But European leaders said they were open to the idea, even if Ukraine has not yet formally requested advanced fighter aircraft from its allies for the war.