Military jets were seen zooming across the sky above London with reports of houses shaking and a huge 'bang'.
The loud roaring noise had been heard by hundreds in Essex, locals have reported.
The sudden explosive sound was heard just before 9.30am. Twitter was awash with worried people who were shocked by the sudden sound.
The Ministry of Defence told Mirror Online that the aircraft were American F15s on a scheduled path.
They confirmed the jets were from RAF Lakenheath and set off from RAF Mildenhall at around 9am.
Did you see the jets fly past? Let us know in the comments
The MOD said the planes were "American F15s from the 4-92nd based at RAF Lakenheath booked into the Thames Valley Avoidance with a route entering near Brentwood".
They added the jets were "heading towards Colchester before departing the Low Flying Area beyond Brentwood".
One wrote on twitter: "Anyone else just hear a sonic boom , presumably a fighter jet, over north London."
Another said: "Woah, two fighter jets and a sonic boom over N london just now - what's that about kids??"
A third posted: "Thought someone’s house had blown up sounds so close."
The loud boom had been heard by hundreds in Essex after military fighter jets were scrambled.
On social media, residents described the almighty and deafening sound of the jets roaring through the skies, EssexLive report.
One said: "I was checking my emails when I heard this almighty loud noise overheard; it sounded like a military jet.
"I couldn't see if from my window but it was very noisy - but was gone after a few seconds."
