A Rikers Island guard claims she was drugged, gang-raped and threatened at a Queens house party — and cops suspect the attackers are her colleagues, police sources told The Post.

The 43-year-old correction officer told police she was at a get-together at 192nd Street and 118th Avenue in St. Albans around 4 a.m. Aug. 27, when two men offered her a ride home, according to law enforcement sources.

The sources were unclear as to where the alleged assault took place, but said the men pinned down the victim and used a medical device to pry open her mouth to force-feed her an unidentified drug.

She told investigators at least two men raped her, according to the sources.

The two then dropped the woman off at her home and warned her not to report the assault, the sources said.

The victim did not seek medical attention until Sept. 7, the sources said.

Police believe the attackers were also correction officers, and one source said they were the woman’s colleagues.

The Queens Special Victims Unit is investigating, the sources said.

Department of Correction spokesman Peter Thorne said, “We take this claim seriously and we will assist the NYPD in any way possible as they investigate.”