Montgomery County police are conducting an internal investigation of reports that officers from the Silver Spring and Wheaton stations have been engaging in sexual liaisons with women while on duty, a police spokesman said yesterday.

The spokesman, Cpl. Phillip B. Caswell, would not comment on specifics of the allegations, but a source familiar with the investigation said some on-duty police officers were accused of using citizen band radios in their police cars to arrange meetings with women.

The source said investigators from the department's internal affairs division traveled to Michigan to interview a woman who formerly lived in the county and who allegedly has said she had sex with some officers.

It could not be determined how many officers are under investigation, but more than one woman allegedly was involved, the source said.

The investigation was begun about two weeks ago by then-police chief Robert J. diGrazia after a reporter from a county newspaper went to the chief with information about alleged police misconduct. The reported said he interviewed at least two women who said they were involved in liaisons with officers.

According to a story in the paper, the twice-weekly Montgomery Journal, yesterday, liaisons took place during late night police shifts in secluded spots in the county.

According to the story, the woman who has since moved to Michigan told the reporter of using police radio receivers, a citizens band station in her home and a CB radio in her car to locate her police friends. She said she was only one of a group of women who used CB radios to contact officers, according to the story.

Officers are permitted to install CB radios in their police cars at their own expense. The sets are permitted so the officers can monitor Channel 9, the channel used for distress calls.