March 27 (Reuters) - Serbia faces the risk of losing

access to vital oil imports on Friday as discussions to prevent

the imposition of sanctions on the country's sole oil refinery

failed, President Aleksandar Vucic told the Financial Times on

Thursday.

A waiver on sanctions is due to expire at midnight, and if

it is not extended NIS, majority-owned by Russia's

Gazprom Neft and Gazprom, could face crude

supply cuts. NIS operates Serbia's only oil refinery, which has

annual capacity of 4.8 million tons and covers most of the

Balkan country's needs.

Vucic told the newspaper on Thursday that he did not expect

a last-minute deal to avert the crisis.

"We've been talking to the Americans, to the Russians, to

everybody" about finding a solution, Vucic told the Financial

Times from Belgrade. "We didn't see any changes in the American

attitude."