Washington ? The officer who arrested Sen. Larry Craig in a police undercover operation at an airport men’s room accused the senator of lying to him during an interrogation afterward, according to an audiotape of the arrest.

On the tape, released Thursday by the Minneapolis Airport Police, the Idaho Republican in turn accuses the officer of soliciting him for sex.

“I’m not gay. I don’t do these kinds of things,” Craig told Sgt. Dave Karsnia minutes after the two men met in a men’s room at the airport on June 11.

The two men disagreed about virtually everything that had occurred minutes earlier, including whether there was a piece of paper on the floor of the stall and the meaning of the senator’s hand gestures. At no time did Craig admit doing anything wrong, although weeks later he pleaded guilty to a reduced misdemeanor charge of disorderly conduct.

“You’re not being truthful with me,” Karsnia told Craig during the interrogation. “I’m kind of disappointed in you, senator.”

Meanwhile, more of Craig’s Republican colleagues moved away from him Thursday in the wake of his guilty plea earlier this month to a reduced charge of disorderly conduct in the undercover police operation aimed at sex solicitors.

Sen. John Ensign of Nevada, chairman of the GOP’s senatorial campaign committee, stopped short of calling on Craig to resign but suggested strongly that he should.

Sens. Norm Coleman, R-Minn., and Susan Collins, R-Maine, each turned over to charity $2,500 in campaign donations they had received from Craig’s political action committee. Coleman and Collins both face potentially tough races for re-election next year.

Coleman and several other Republicans – including Sen. John McCain, R-Ariz. – have called for Craig to resign his seat in the Senate. Craig already has agreed to a request by Republican leaders to give up his ranking status on the Veterans Affairs Committee and Appropriations subcommittees.

GOP Senate leaders said they did not act lightly in asking Craig to give up his leadership posts temporarily. But they said their decision was “in the best interest of the Senate until this situation is resolved by the ethics committee,” of which Sen. Pat Roberts, R-Kan., is a member.

On the tape, Craig and the arresting officer can be heard arguing over what happened in adjoining stalls of the men’s room minutes earlier. Craig acknowledges that the men’s feet bumped but says nothing improper happened.

“Did we bump? Yes, I think we did. You said so. I don’t disagree with that,” Craig said.

But Craig disputes the officer’s account that he swept his hand under the stall next to him in an apparent effort to advance the encounter. They even disagree whether Craig used his right hand or his left hand.

Craig said he was merely trying to pick up a piece of paper – an account the officer disputes; he said there was no piece of paper.

Karsnia said in a police report that he recognized Craig’s hand gesture as a signal aimed at initiating sex.

Karsnia, 29, has arrested at least a dozen men in the airport’s bathroom for sending signals he believed were aimed at initiating sex.