LONDON, Jan 23 (Reuters) - British services company Serco has made a $2 billion bid for U.S. defence consulting firm SRA International Inc , the Sunday Telegraph reported, adding the bid had been rebuffed but Serco was "sweetening" its offer.
If the deal went through, it would make Serco, which manages services for Britain's schools and armed forces and runs prisons and rail services, the biggest foreign company providing services to the U.S. government, the newspaper said.
SRA is a Fairfax, Virginia-based defence consulting firm.
Serco, advised by UBS, was thought to have made its initial offer some weeks ago, the newspaper said.
"It is still very early days," the paper quoted a "senior source" as saying.
No one answered the phone at Serco and there was no immediate response from a spokeswoman for SRA.
(Writing by Michael Roddy; Editing by Nick Macfie)