A pair of robbers - one disguised in a shark onesie - has held up a petrol station in Canterbury early this morning.
Police say two men threatened staff with a hammer and a knife at the Rolleston BP on Main South Rd at about 2.20am.
Both had concealed their identities to carry out the early morning heist.
"They were on foot and wearing disguises. One was dressed in a shark onesie," said a police spokesman.
The second man was in a hoodie.
He said the pair then proceeded to stuff a bag with lollies before fleeing on foot.
The spokesman said the incident was traumatic for the two staff who took refuge in a room at the station.
Police were now examining CCTV footage to identify the heavily disguised pair.
The shaken staff were being supported by Victim Support and station management.
Detective Senior Sergeant Mark Worner, of Christchurch Metro Crime Squad, said police searched the surrounding area but were unable to find the offenders.
Police would like to hear from anyone who may be able to identify these men or may have seen people wearing these clothes in the area.
Anyone with information which can assist Police in this investigation is asked to contact Christchurch Police on 03 363 7400.
If people wish to remain anonymous they can call Crimestoppers on 0800 555 111.
