THE robber who sprayed a pregnant woman and two other female employees of a Twin Waters Pharmacy with what they believed to be poison told them he had a motion-detecting bomb that could explode if any of them moved.
Police revealed more information yesterday about the "cowardice" robbery on Friday, when a pregnant woman and her two co-workers were sprayed and had their lives threatened.
"He entered the pharmacy, forced the ladies to a corner, sprayed them with an unknown substance and then demanded a quantity of drugs and cash," Detective Sergeant Graham Farlow said.
The "bomb" - which was a silver foil-wrapped cylinder with a camera attached and liquid inside - looked legitimate enough for police to bring in experts.
The man presented the "bomb" - which turned out to be fake - along with a knife as he demanded drugs and money.
He fled the Ocean Dr complex about 12.15pm with drugs but no stolen money and was last seen heading towards the nearby golf course.
"I view this as an act of cowardice," Sgt Farlow said.
"What he has done to the ladies, one of the ladies being 20 weeks pregnant, that is not on."
The pharmacy was open as usual yesterday but a staff member declined media interviews, asking for privacy and saying his colleagues had already been through enough.
The liquids used in the fake bomb and the spray canister are being analysed.
However, none of the women reported adverse affects when they were treated by the Queensland Ambulance Service.
The man was described as being in his mid to late 40s and 180-185cm tall.
Underneath the hazmat suit he was wearing a red t-shirt bearing an unknown white logo, knee-length dark-coloured shorts and white or grey joggers.
Police confirmed the man was at the shopping complex for about 40 minutes before he entered the pharmacy.
A witness from the neighbouring medical centre told the Daily on Friday the man had said he was from council and spraying for fire ants, but it appeared he was casing the businesses.
Sgt Farlow said it was unclear whether drugs were the man's main target.
"That's what his demand was, however, who knows what's in a person's mind," he said.
The area was cordoned off following the robbery. Police declaring it an emergency zone at about 3pm and deeming it safe just before 5pm.
Sgt Farlow appealed for information from the public.