WASHINGTON — The Pentagon and State Department have proposed to the White House a plan to supply Ukraine with anti-tank missiles and other arms, according to Defense Department officials.

The proposed transfer — which also would include antiaircraft arms that would be defined as defensive weaponry — comes as fighting between Ukrainian troops and Russian-backed separatists has increased in recent days, and the United States is taking steps to deter aggressive military actions by Moscow.

The plan by the Pentagon and State Department has been presented to the White House, but no decision has been made, said a Defense Department official, who spoke on condition of anonymity to discuss a proposal still under review. It was not clear if President Trump had been briefed on the proposal.

Whether to provide more substantial weaponry to Kiev’s beleaguered forces has embroiled American policy makers for several years.