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The US Air Force has apologised after one of its aircraft broke the sound barrier over Aberystwyth on Monday afternoon, apparently causing a sonic boom over the town.
Several F-15E Strike Eagle jets stationed at RAF Lakenheath in Suffolk were taking part in a training exercise at the time.
A spokeperson said the force offered "sincerest apologies for any disturbance or concern".
"At that time, several F-15E Strike Eagle aircraft were conducting a challenging air-to-air training mission.
"Typically, this would be carried out over water but the airspace to be used was lost to us and the jets were re-routed to the Wales Military Training Airspace" the spokesperson said.
"During the course of the training exercise, near the coast and in the vicinity of Aberystwyth, one of the aircraft, already travelling at high speed, inadvertently and briefly went supersonic at around 18,000 feet and in the process was likely to have caused the noise that was reported online."
Dylan Lewis, a resident of Aberystwyth, has described what happened when a suspected sonic boom shook the town earlier today.
He said "there was an incredibly loud boom. I thought the chimney had collapsed - so I ran out into the garden."
Morrisons supermarket in Aberystwyth had to close some of its tills, after tremors from a suspected sonic boom caused ceiling tiles to move.
The tills were closed briefly while staff checked for damage.
There have been other reports of rooms shaking, after many people heard what they thought was an explosion in the town.
People in Aberystwyth have felt tremors from a suspected sonic boom this lunchtime.
Owain Meredith from ITV News said it happened at around 1310, and the room shock with what initially sounded like an explosion.
He said two jets were seen flying overhead.
Sonic boom in Aberystwyth, shook the office and frightened the seagulls.
The Bath Rock Shelter on Aberystwyth Promenade will be rebuilt using as much of the original timber as possible says Ceredigion Council.
A meeting on Monday between the council and Wales' historical monuments body CADW decided the work would use as much of the original timber as possible.
The work will start when the sea wall has been strengthened and the weather improves which could be before the end of May.
The future of Aberystwyth's iconic seafront shelter that was damaged in January's storms will be discussed later today at a meeting involving Cadw and Ceredigion County Council.
The grade II-listed shelter on the promenade was badly damaged and close to collapse after being batter by the waves. Work has already started to remove the shelter.
It is estimated that the cost of the repairs to the shelter and the town's promenade could be in excess of £1m.
Pembrokeshire County Council says it is helping police with their investigation after ten bus passengers were rescued on Saturday night.
Pembrokeshire County Council’s own enquiries confirmed the road was in the process of being closed and that signage was being erected at Pen-y-Cwm, north of Newgale. However, the Council operatives at Pen-y-Cwm were already directing traffic to use an alternative safe route avoiding the Newgale road. The bus driver was informed of the situation at Newgale and that the alternative route should be followed. However the driver chose to continue his journey along the main road.
A Council operative followed the bus in his own car equipped with a flashing orange beacon on the roof. He was also flashing his headlights in an attempt the stop the bus but was unsuccessful. A member of the public on the bridge at the bottom Pen-y-Cwm Hill also tried to flag the bus down with a torch but he too was unsuccessful. The Council has provided information to the police in relation to their investigation into the incident.
Ten people had to be rescued from a bus last night, after it was hit by a large wave in Pembrokeshire.
High tides and strong winds hit Wales for the second time in a few weeks, but last night's damage appears to be a lot less than feared.
Mike Griffiths reports.
Heavy machinery has removed the bus from water at Newgale, Pembrokeshire.
Ten people were rescued on Saturday night after a large wave swept the vehicle into the water.