"People across the city took to social media to report they'd heard a loud noise at around 4.15 a.m. local time prompting "#explosion" to become the top trending topic on Twitter. I just woke up with what looked like an explosion in the distance and made North London tremble, "a Twitter user wrote".
"There is no cause for public concern", the police said earlier, adding that there were no reports of an explosion.
The force tweeted: "The loud bang heard throughout north London and surrounding areas was the result of a sonic boom from RAF planes". "There is no cause for concern".
Still, the force of the boom sparked fear into the hearts of Britons when it was heard across London, Hertfordshire and up to 60 miles away in Cambridge, shaking homes and waking people in a panic.
"Awakened in panic", wrote Lynn James in Hertfordshire. A woman asked, "Bomb in London?"
It was heard across London, Hertfordshire, Bedfordshire and Cambridgeshire. Being concerned in case probabilities are you'll maybe even absorb kids listening to that dang #explosion'. "Heard loud explosion plus police sirens around 4: 10am".
Police across Essex received heaps of 999 calls reporting an explosion, nonetheless the noise was as soon as believed to be the two RAF jets breaking the sound barrier.
Some said they were "too scared to go back to sleep" while other users asked, "Do I agree, am I the only one to panic that we are bombarded?"
Authorities additionally confirmed they had been being inundated with emergency calls.
Authorities later confirmed that the noise had been caused by two RAF Typhoon fighter jets that took off from Coningsby in Lincolnshire to intercept an aircraft that was unresponsive.