Ukraine kept pounding the Russian border region of Kursk with missiles and drones on Wednesday, as Kyiv said it had made further territorial gains in an incursion that U.S. President Joe Biden called a "real dilemma" for the Kremlin's leader.

President Biden said Tuesday that Ukraine’s surprise counter-invasion of Russia is “creating a real dilemma” for Russian President Vladimir Putin — and that the American government is in “constant contact” with Kyiv.

President Biden, in his first extensive remarks on the issue, stated that Washington is continually communicating with Kyiv about the operation.