is no concrete evidence for this yet.

"My personal view is that it is unfortunately very likely that a real Islamist suicide attack took place here," he said.

The Syrian – who has not been named – entered Germany two years ago – but his asylum application was turned down a year ago.

But he was allowed to stay in Germany because of the ongoing war in Syria.

He was known to police, had tried to kill himself twice before and had been in psychiatric care.

Paramedics tried to revive him – but he died at the scene.

Germany's interior minister has since ordered an increased security presence at airports, train stations and elsewhere in the wake of a string of recent attacks.

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Mr Hermann also said an attempted terror attack cannot befirefighters drafted in from nearby cities to deal with the major incident.

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The explosion happened in the middle of the three-day Ansbach Open music festival – which has now been cancelled.

Up to 2,500 people had to be evacuated from the concert venue.

Heavily-armed police quickly descended on the scene.

People were evacuated and a large exclusion zone was placed around around the scene of the blast.

Witnesses report houses and hotels have been evacuated – and people cannot get back into their homes.

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Some local media initially reported the explosion was caused by a gas leak.

But authorities have confirmed it was a homemade bomb int he man's backpack.

Ansbach Mayor Carda Seidel confirmed it was an explosive device and a spokesman for the Bavarian Interior Ministry said the explosion was