Several people are wanted over three separate armed robberies overnight in north and southeast Queensland.

Detectives are hunting for several men following three separate armed robberies overnight in Queensland.

Police say a man threatened a grocer with a knife in the southern Cairns suburb of White Rock about 9.20pm on Friday.

The alleged thief made off with an undisclosed sum of money.

A few hours later, a man armed with a knife demanded money from a bottle shop attendant in the northern Brisbane suburb of Nundah.

The offender, who wore a black jacket, blue jeans and a green beanie, made off with the cash on a black bicycle.

During another robbery in the early hours of Saturday, two men, who said they were armed with a gun, approached two friends in Brisbane’s Kangaroo Point.

The alleged thieves, who wore hooded jumpers and hid their faces, then ran off with the goods.