Two threatened in Qld armed robbery

Two people have been threatened with a knife and one was assaulted when two men entered a Brisbane supermarket and escaped with groceries.

The men entered the Sunnybank supermarket just before 9pm on Thursday and were challenged by a female staff member when they tried to leave without paying, police said.

The men threatened the woman with a knife and left with the items before assaulting a male staff member from another business who followed them and challenged them.