A MAN who held up a Twin Waters pharmacy, sprayed suspicious liquids on staff and threatened the group with a bomb is still on the run.

Detectives say they are "very concerned" that the wanted man is still at large.

The offender spent 40 minutes at the Twin Waters shopping centre on January 15 before he committed the crime.

Police want to talk to this man after last week's pharmacy robbery.
Police want to talk to this man after last week's pharmacy robbery.

The man entered the Twin Waters Pharmacy on Ocean Dr in a hazmat suit about 12.15pm and yelled that he was carrying rat poison and a bomb.

Acting Detective Senior Sergeant David Harbison said police had followed a number of leads from the public to no avail.

"It is very concerning that the man remains at large, especially when someone like this is prepared to go to such lengths to commit such an offence," he said.

"He has shown a degree of planning to conceal himself in such a manner.

"For us it shows premeditation rather than perhaps your normal armed robbery."

Police have been canvasing stores which sell hazmat suits similar to the one worn by the bandit.

The man was described as being in his mid- to late-40s and 180-185cm tall. He was wearing a red t-shirt bearing an unknown white logo under the hazmat suit.

He was also wearing knee-length dark-coloured shorts with white or grey joggers.

Anyone with information should phone Crime Stoppers on 1800 333 000.