Exclusive: Musk's SpaceX says it can no longer pay for critical satellite services in Ukraine,

Washington(CNN) Since they first started arriving in Ukraine last spring, the Starlink satellite internet terminals made by Elon Musk's SpaceX have been a vital source of communication for Ukraine's military, allowing it to fight and stay connected even as cellular phone and internet networks have been destroyed in its war with Russia.

So far roughly 20,000 Starlink satellite units have been donated to Ukraine, with Musk tweeting on Friday the "operation has cost SpaceX $80 million and will exceed $100 million by the end of the year."

But those charitable contributions could be coming to an end, as SpaceX has warned the Pentagon that it may stop funding the service in Ukraine unless the US military kicks in tens of millions of dollars per month