Police are investigating after a service station was robbed by a man armed with a knife in Bowen Hills.

Initial investigations indicate around 7:20pm a man with his face covered entered the Bowen Bridge Road business and approached the counter before demanding money from the employee.

The worker complied, handing over a sum of money before the man left the premises on foot.

The man is described as being aged in his early 20s, slim build, wearing a beige cap, black long-sleeved shirt and black pants.

No one was injured during the incident.

It is believed the man may be the same person who robbed a South Brisbane convenience store around 5:50pm.

Investigations are continuing.