TRENTON (AP) -- Seven New Jersey state troopers who have been on suspension with pay for nearly two years after they were accused of sexual assault will remain suspended but no longer receive paychecks, although no criminal charges were ever filed.

David Wald, a spokesman for Attorney General Anne Milgram, whose office oversees the State Police, said the troopers' pay was suspended Saturday as part of an internal disciplinary matter. He had no further comment.

Letters State Police Col. Rick Fuentes sent the troopers in an internal investigation said the troopers discredited the agency because they "exercised poor judgment and displayed conduct unbecoming a sworn member of the Division, specifically being one of seven enlisted members who engaged in sexual acts with a female college student who had ingested intoxicants."

A few of the troopers also violated gift bans by flashing their badges to bouncers at a club, who let them in and waived an $8 cover charge, according to the letters that were part of court filings.

The troopers had been suspended with pay since December 2007, when a 25-year-old Rider University student reported she had been raped in the Ewing Township home of a trooper after a night out at a Trenton nightclub.

The Middlesex County Prosecutor's Office opted not to present the case to a grand jury but did not offer an explanation. Neither the accuser nor the troopers have been publicly named.