NEW YORK - (AP) -- Power has been restored to a luggage screening system at New York's John F. Kennedy International Airport hours into a partial power outage at a terminal.

Full power is expected to be restored soon to the terminal, where a false report of gunfire caused an evacuation over the weekend.

Fort Worth, Texas-based American Airlines operates Terminal 8. It says escalators and elevators are out of service but power has been restored to its checked-bag screening system.

The airline said Tuesday night it hoped to have full power restored within hours. It says the problem was caused by a transformer that failed Tuesday afternoon.

A report of gunfire at the terminal led to chaos Sunday. Authorities are exploring the possibility loud cheering after Usain (yoo-SAYN') Bolt's Olympic 100-meter dash victory prompted the panic.