Ukraine should have the right to strike military facilities on the territory of Russia, Latvian Foreign Minister Edgars Rinkevics said, Bloomberg reported.

Although the U.S. has not imposed restrictions on how Ukraine uses weapons, it has so far refused to send weapons with enough range to strike Russian territory.

The Biden administration is providing Ukraine with increasingly sophisticated weapons, including multiple rocket launchers, but officials have refrained from sending a tactical missile system, known as ATACMS, because of its ability to hit targets in Russian territory.

Washington has so far refused to provide fighter jets, citing assessments that the planes would not improve Ukraine's prospects. The introduction of longer-range weapons has raised fears that the conflict could escalate or expand into NATO territory.

Those fears are shared by Congressman Michael McCaul, a Republican from Texas who is set to take over as chairman of the House Foreign Affairs Committee after the Republican Party gains control of the chamber in January. In an interview, he said such attacks would undermine public support for Ukraine.

Rinkevics said several other member states also believe Ukraine should have no restrictions at all on how it uses weapons, but ultimately it's up to individual countries to decide what weapons to give Kyiv.