Chief Inspector Andy Hughes said: “The investigation is in the early stages but this was clearly a reckless act in a residential area in broad daylight.

“At this stage we have not received any information to suggest anyone has been injured but urgent enquiries are being carried out to trace the taxi and identify the bike rider.

“We would ask anyone who was in the area of York Terrace or Northumberland Terrace at around 11am today who saw the bike or has any further information or dashcam footage which could assist us to get in touch.

“We know all too well that tragedies can occur when people choose to arm themselves with guns and it is vital that the public comes forward and tells us what they know so we can take immediate and positive action.”

Police sat they have not received any reports of people being injured or damage caused.

An investigation is underway and house-to-house, CCTV and witness enquiries are being carried out in the local area.