Two men have been arrested for allegedly raping a female stranger near the Darwin CBD in mid-January NT Police said, an attack police did not make public after the agency became aware of it four days later.

NT Government crime marketing manager Sita Bacher said in a statement police allege a 36-year-old man and a 38-year-old man sexually assaulted a woman they did not know, on January 14 near the Darwin CBD.

She did not say if the rape was alleged to have been committed in the street or a home.

Ms Bacher said police received the information four days after the alleged rape, and detectives from the sex crimes division have been investigating since.

The men were arrested on Monday, police said, and both have since been charged with one count of sexual intercourse without consent and remanded to appear in Darwin Local Court on Wednesday.

Police are urging victims to call them on 131 444 or in an emergency to call triple-0.