Police have interviewed a man over claims that migrant sex workers are being held against their will in a central Auckland apartment.
The man, who had visited as a client, claimed the prostitute he was with wrote a note seeking help and secretly handed it to him. Written in Korean ethnic script on a yellow Post-it note, it translates as: "Help me! I want to go back to Korea."
Police said they had concerns over the validity of the man's information.
The man claimed he called 111 after receiving the note but did not make a report after he was transferred to Crimestoppers, a service that allows people to provide information anonymously.