ISIS supporters have mocked the attack on London Bridge, claiming it was revenge for the 'love from Manchester' message scrawled onto an RAF airstrike missile.

The image of a Paveway IV bomb on its way to strike ISIS targets in Syria was posted on Twitter in the aftermath of last week's Manchester attack.

In the hours after last night's terrorist attack in London, social media users in support of ISIS claimed the murder spree was in response to the defiant message.

One account, which was retweeted by Rita Katz, the executive director of SITE Intelligence Group, wrote: 'This is your merchandise and tonight we responded.'

ISIS supporters have mocked the attack on London Bridge, claiming it was revenge for the 'love from Manchester' message scrawled onto an RAF missile (pictured)

Six people were killed and at least 30 are thought to be injured, police said. The three attackers were also shot dead during just eight minutes of violence

It is understood the original message and photograph were the brainchild of a drone squadron based at a secret location in the Middle East.

The defiant note was initially believed to be a social media hoax but RAF bosses later confirmed its veracity.

It is understood it was the brainchild of a drone squadron based at a secret location in the Middle East, in response to Monday night's terror attack at Manchester Arena that claimed 22 innocent victims.

It was reported to be a Hellfire missile on social media, although it was later confirmed as a Paveway IV bomb.

The picture appeared on Twitter with the caption: 'RAF Armourer on a Reaper UAV squadron wrote this on a Hellfire (sic) missile before taking off on a Syria mission'.

An RAF spokesman told MailOnline: 'The RAF can confirm the photo was genuine'.

The bodies of two men, believed to be terrorists, lie in the road in Borough market after shots had been heard

ISIS terrorists have celebrated the attack in London bridge which killed seven people and left 21 in critical condition on Saturday night

The message 'Love from Manchester' was written on a Hellfire missile destined for ISIS

Prime Minister Theresa May has expressed her 'huge gratitude' to the emergency services who were on London Bridge within two minutes of last night's attack beginning

A source said: 'The sentiment of the message is understandable under the circumstances.

'There's a history of messages being written on missiles in the RAF.

'It's unlikely the individual responsible for it will be disciplined.'

The tradition of writing messages on bombs dates back to the Second World War and has featured in every conflict since.

Following the terror attacks in Paris in November 2015 that left 130 dead, the message 'From Paris, With Love' daubed on American bombs and missiles bound for ISIS strongholds.

Russian military also inscribed 'For Paris' on bombs destined for ISIS targets in Syria, in solidarity with the victims of those horrifying attacks in the French capital.

A traumatised man who helped the wounded victim led away on a stretcher walked away with blood on his shirt. A horrified bystander wrapped in a foil blanket was led away from the police

During the incident the Metropolitan Police asked Londoners to 'run, hide, tell'

While ISIS has not claimed responsbility for the attack, the group has been calling for knife and vehicle attacks during the month of Ramadan

Twisted ISIS militants have praised the London Bridge attackers who murdered seven innocent civilians and wounded 48 more on Saturday.

Dozens of images have appeared on anonymous messaging channels with links to the terror group celebrating the slaughter and vowing to carry out more attacks.

While ISIS has not claimed responsibility for the atrocity, fighters had been calling for vehicle and knife attacks targeting the West to take place during Ramadan.

Three jihadis ran down 20 people on London Bridge shortly after 10pm before going on a knife rampage through Borough Market, stabbing strangers at random.

Police eventually shot the men, who were wearing fake suicide vests, dead outside the Wheatsheaf pub.