A "SONIC boom" rocked Liverpool today after a "big explosion" was heard over the city.
Residents in Clubmoor, Aintree and Liverpool said they heard the loud noise this morning.
Flight tracking website FlightRadar24 showed a jet flying over the area at the time the sound was heard.
A sonic boom is heard when an object travels through the air faster than the speed of sound.
To break the sound barrier, aircraft need to hit a speed of 770mph.
The Sun Online has contacted the Ministry of Defence for comment.
More to follow…
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