A former ISIS jihadi has revealed that the terror group sent him away from Syria and back home to Germany telling him they wanted him to be part of a wave of attacks across Europe.

German-born Harry Sarfo, who grew up in the UK, spent four days straight driving to Syria to join the extremists before spending three months with them in their Raqqa stronghold.

However, he was arrested when he left the caliphate and tried to return to Europe.

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Former jihadi Harry Sarfo, pictured in an ISIS propaganda video, said bombing campaigns in Syria will only cause more people to join the terror group

Now in an interview with the New York Times from his prison cell, where is being held before standing trial over terror charges, Sarfo has revealed how ISIS do not want Europeans to travel to Syria anymore.

He told the newspaper that a commander within the terror group told him what they really wanted them to do was return to Europe to unleash a fresh wave of attacks.

Sarfo explained: 'He was speaking openly about the situation, saying that they have loads of people living in European countries and waiting for commands to attack the European people.

'And that was before the Brussels attacks, before the Paris attacks.

'They said, "Would you mind to go back to Germany, because that’s what we need at the moment."' And they always said they wanted to have something that is occurring in the same time: They want to have loads of attacks at the same time in England and Germany and France.'

Sarfo, pictured, is awaiting trial in Germany for terror offences. He said he left ISIS last summer because of its 'extreme interpretation' of Sharia law

Sarfo, who is in a high security jail in Bremen, also warned how many ISIS extremists, originally from Europe, have now left Syria and gone back home.

Previously the 27-year-old spoke about how he witnessed children taking part in executions and carrying suicide bombs and brutal stonings and beheadings during his time in Syria.

He also said the coalition bombing raids would only radicalise more people should they lose family members in the air strikes.

A former Royal Mail worker, Sarfo, who moved to London as a teenager, said he trained with ISIS in Syria and experienced bombings 'nearly every day', while he also heard jihadis talking about plans to attack the UK and Europe.

Sarfo said he was attracted to the group because of its ideology of uniting people under one flag, and that he told its leaders he would not be prepared to take part in terror attacks.

ISIS has previously cited bombings as part of the reasons for its attacks in Paris and Belgium

He became radicalised after being forced to leave the UK in 2010 when he was jailed for a robbery in Germany.

While in prison he spent time with an Al Qaeda-linked recruiter and then joined a radical mosque in Bremen after his release.

Sarfo was then blocked from travelling to Syria on a 'charity mission' and said subsequent police treatment led to him joining ISIS after strict security measures 'destroyed his life' and 'made him the man they wanted'.

ISIS has previously cited bombings as part of the reasons for its attacks in Paris and Belgium.

The Pentagon has recently estimated air strikes in Iraq and Syria between September 2015 and February 2016 have killed 20 civilians, bringing the 'official' total to 41 since the campaign against ISIS began.