Randall H. Long, a captain in the Alexandria Fire Department, has been charged in Fairfax City with nine felony counts of indecent exposure to minors, police officials said yesterday.

Long, 37, of the 5900 block of Vernons Oak Ct., Fairfax, also was charged yesterday with a single misdemeanor count of indecent exposure by George Mason University police.

"It is very definitely our position right now that there has been some sort of very grave misunderstanding here," said Long's lawyer, Thomas P. Dugan. "Mr. Long is not guilty, and that's the way that we'll be proceeding with this case."

A spokesman for the city of Alexandria said Long had been placed on administrative leave with pay pending an internal review.

Long was released from the Fairfax County jail yesterday on $45,000 bond. A preliminary hearing was set for June 17 in Juvenile and Domestic Relations Court.

Fairfax City police said Long was arrested at home Thursday night in three exposure incidents dating back to October near Green Acres Elementary School.

In each incident, police said, a man was parked in a vehicle near the school, attracted the attention of a group of children by honking his horn or calling to them, and when the children approached, exposed himself.

The George Mason charge stems from an incident Wednesday on a jogging path near the school, police said.