NASHUA -- Two men have been arrested in separate incidents for allegedly exposing themselves to an undercover police officer at Greeley Park and the adjacent Hills Ferry Road boat ramp.

Steven Calawa, 61, of 168 Charles Bancroft Highway, Litchfield, and Roland Neff, 80, of 57 Coventry Court, Merrimack, have both been charged with separate counts of indecent exposure and lewdness, according to police.

Authorities said that on Oct. 18, the Nashua Police Department's Problem Oriented Policing Unit conducted an undercover operation in the area of Greeley Park and the boat ramp to target and eliminate lewd and indecent behavior, which has been a problem in both park facilities recently.

The two men have been released on $1,500 cash or surety bail pending an upcoming arraignment at the 9th Circuit Court, Nashua District Division.