Officers have launched an investigation into a spate of robberies at banks on the same road in Oldbury believe the crimes are linked.
Two of the incidents occurred at TSB on Tuesday 28th February and Thursday 9th March while the third took place at Barclays Bank on Wednesday 15th March on Birmingham Street.
Sergeant Wayne Dudley, said: “On each occasion a man entered the store and handed over a note stating he was armed with a gun; although no weapon was reportedly seen.
He threatened to harm staff if they did not hand over money and eventually fled with a substantial amount of cash each time.”
Officers have secured CCTV footage and are confident the same man is responsible for all three robberies.
Anyone with information is asked to contact Sergeant Dudley on firstname.lastname@example.org or by calling West Midlands Police on 101.