Ukrainian officials are pushing to acquire longer-range missiles for deeper strikes on Russian-controlled territory, including Crimea, raising questions about how aggressively the Joe Biden administration is willing to support Kiev's military goals, WSJ writes.

U.S. officials urged Ukraine to focus on the fighting around Kharkiv and Kherson. Meanwhile, Ukrainian officials are again calling for more weapons, including advanced systems such as the ATACMS tactical missile system, congressional officials said.

These long-range missiles are needed in part to strike Crimea, which Russia is using as a base to launch Iranian-made drones, congressional and Ukrainian officials said.

Biden has so far refused to provide Ukraine with ATACMS that can strike deep into Russian territory.

The administration's reluctance to provide these long-range missiles reflects a deeper dispute, in part, about how to support Ukraine without risking a broader conflict with Russia.

The reason we are not giving them these weapons is the disagreement over strikes against targets in Crimea, said Rep.