Two men, one armed with a long-barrelled firearm, are wanted by police after a robbery at a Bay of Plenty petrol station.

Rotorua Police are investigating an aggravated robbery that took place at the Lynmore Junction BP on Te Ngae Road on Monday December 10.

Two men entered the service area of the BP at around 2am, one armed with a long-barrelled firearm. The firearm had a muzzle device which appears similar to a silencer, says Detective Leonie Smith.

"The men demanded tobacco, cigarettes and cash. They then ran out of the shop, heading towards Lynmore School in Isles Road. They were then seen to get into a sedan-type car and drive away.

"The man with the firearm is described as Māori, around six foot tall, with a skinny build, and aged in his twenties. He was wearing a dark hoodie and had a red bandana covering his nose and mouth.

"The second man is also described as Māori with a skinny build, and was in his late twenties. He was wearing a grey hoodie."

Police would like to hear from anyone who saw anything suspicious around the time of the robbery in the Lynmore Junction/Isles Road area.

If you can help, please call Rotorua Police on 07 349 9400. Information can also be provided anonymously via Crimestoppers on 0800 555 111.