A U.S. offer of $30 million to upgrade Kyrgyzstan’s air-traffic control system will not change the decision to shut down the U.S. air base in Bishkek, Kyrgyz officials said this week.

On Tuesday, a U.S. Senate panel approved the appropriation, which was part of the war-funding bill for Iraq and Afghanistan. But later in the week, according to English-language stories posted on the Web sites of Interfax and other international news agencies, a Kyrgyz government spokesman said the assistance would have no effect on the fate of the base.

While Kyrgyz officials have said the decision to close Manas Air Base — approved after a February parliamentary vote — is final, U.S. officials have said negotiations are ongoing.

Manas has long been a crucial hub for troops and supplies heading in and out of Afghanistan. With a major influx of troops and equipment, the military has been seeking alternative supply routes.

Although the base closure decision came shortly after Russia pledged more than $2 billion in aid and loans to Kyrgyzstan, Russia has denied trying to push the former Soviet republic into making that move. Russia has also announced plans to increase the number of aircraft at its own air base in Kyrgyzstan.