The order to limit a satellite system used by Ukraine for battlefield communications and drone operations came from inside the White House, according to two US officials and a Western official briefed on the matter.
The officials said leaders at the Defense Department received a message that the SpaceX Starshield service for the Ukrainian military needed to be slowed.
The officials, who spoke on the condition of anonymity, did not specify who in the White House made the decision or who was responsible for implementing the order. The Pentagon is the biggest customer of Starshield, which is the military-grade version of the Starlink service.
Ukrainian officials said this week that military-grade Starlink receptors stopped working in Ukraine when mounted on fast-moving objects, interfering with the performance of Ukrainian drones that rely on them for onboard guidance systems over Ukrainian territory.
A person in Ukraine's Defence Ministry said on Thursday that the receptors were now working when in motion, but only at speeds of up to 100 miles per hour (160 kph).