Mexico City prosecutors say another young woman is among the group abducted from an after-hours bar in a normally calm district in the capital, raising the number of missing to 12.

Chief prosecutor Rodolfo Rios also says two waiters and a woman have been detained in the case.

He says surveillance video shows most of the group arriving at the bar together in a car and in a taxi. Rios won't say if there is footage showing them leaving or being abducted.

A man who said he escaped the mass abduction from the bar on May 26 told authorities that masked men with guns and SUVs kidnapped the group in broad daylight.

Rios says that man gave police a false name and address and he hasn't been found again.