Amateur video captures the moment panic spread - pictures from You Tube
America's Next Top Model host Tyra Banks says she is "concerned" after an audition for her show ended with six people injured and three arrests.
Thousands of modelling hopefuls were queuing outside a hotel in Manhattan, New York, when bedlam broke out.
Police cancelled the audition but could not say what had sparked the panic.
Banks and the show's producer Ken Mok said: "We are concerned by the events. We still don't know all the details of what triggered the incident."
They added: "We appreciate the efforts of the NYPD and will assist them in any way possible in this matter."
Reports suggest the incident involved a man charging into the crowd in an attempt to steal handbags.
Clothes and shoes were abandoned in the street as women tried to escape the melee.
Tyra Banks created America's Next Top Model
Some of those waiting in line at the Park Central New York hotel had camped out overnight with chairs and sleeping bags to get their shot at fame.
Of those injured, only two were taken to hospital, according to the New York fire department.
Two women and a man were arrested on charges of inciting to riot and disorderly conduct.
This 13th series of the reality show is seeking 12 finalists who are shorter than the average model, with auditions only open to those under 5ft 7ins.
Fronted by supermodel Banks, it is broadcast on CW in the US and Living in the UK.