Police are hunting a bandit who boasted “I’ll be back” after robbing service stations in Melbourne’s eastern suburbs, threatening to kill one of the workers.

The robberies were both captured on CCTV.

The offender can be heard threatening to strike 25-year-old worker Emran and vowing to return during the hold-up of the Doncaster BP, which occurred just after midnight.

“All the cash, the hundreds,” the thief is heard saying.

“I’m gonna hit you in the head… give it to me.

“I’ll come back to you tonight.”

Staff at the business are instructed to regularly clear the till of cash to prevent such incidents and the robber escaped with around $185.

Store owner Nash Labib said his worker was traumatised by the experience.

“It’s very bad, very bad,” he told 9NEWS.

“I came and I found (the worker) shaking, completely shaking.”

Police believe the same offender was responsible for another armed hold up of a service station in Lower Templestowe at about 4am on Saturday morning.

Just like this morning’s incident, the offender asked if the worker had insurance before making threatening demands.

“Quick, the hundreds, from inside, quick,” the thief said.

“I don’t want to hurt you, quick, you’re Indian, we’re human.

“I don’t want to hurt you, I don’t want your blood to come out.

“Quick before I do something to you, the hundreds.”

He is described as being of medium build and has a European accent.

He was wearing dark clothing at the time of the robbery.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 FREE.

Extracted in full from Nine News.