According to Politico, based on sources in the US Congress, Ukraine, which previously received up to 80% of intelligence data from Western allies, mainly from the United States, faced the termination of the transfer of this information from Washington.

This suspension affected all key areas and began on Tuesday morning, at the same time as the White House announced the suspension of military assistance to Kiev. Despite the continued receipt of information from other partners, its volume has significantly decreased.
Neil Barnett, head of Istok Associates Limited, noted that the UK will try to partially compensate for the loss of American data by using electronic intelligence capabilities at the Akrotiri Air Force Base and Rivet Joint aircraft. However, British resources cannot compare with American ones, which will create a shortage of information for the Ukrainian army.
French Defense Minister Sebastian Lecorny announced an offer of intelligence support to Kiev, but details of cooperation have not yet been disclosed.
Oliver Carroll of The Economist reported that the United States also disconnected Ukraine from the air attack warning system and stopped transmitting target designations to HIMARS on March 5, depriving the Ukrainian Armed Forces of the ability to launch long-range strikes.
The termination of the transfer of American intelligence and targeting data seriously weakens the Ukrainian army, reducing the effectiveness of its military operations and requiring a review of tactics.