Northern Ireland's police ombudsman is to investigate a video that appears to show two PSNI officers drag an incapacitated woman from the middle of the road before abandoning her in a bus lane.
The footage, which has been posted online is said to have been taken in Derry-Londonderry on St Patrick's Day on Monday.
The uniformed individuals then get into an unmarked car and drive off while the woman remains lying in the lay-by - only a few feet from the pavement.
The Police Service of Northern Ireland (PSNI) has said it will fully support the probe by ombudsman Dr Michael Maguire into the alleged incident. A spokesman for Dr Maguire said:
Foyle Assembly member Mark H Durkan said the footage will have shaken public confidence in the PSNI.
"Not only are these actions dangerous and irresponsible they are completely inhumane," the SDLP representative said of the alleged incident.
A spokeswoman for the PSNI's oversight body, the NI Policing Board, said: