Some bus passengers in Spokane, Washington, suddenly found themselves with some extra spending money for the holidays.

A mysterious woman hopped aboard Spokane Transit Authority buses yesterday, greeted passengers with "Merry Christmas" and handed each an envelope before stepping off. The envelopes contained a card and $50.

The scene was repeated on several other buses.

The secret Santa did it so quickly that descriptions of the woman varied among surprised passengers.

An S-T-A spokesman says they haven't been able to identify the woman, who gave away at least $1,000.