German authorities announced Monday that they found a video on the mobile phone of a Syrian suicide bomber who blew himself up in Germany in which he "pledged allegiance" to ISIS leader Abu Bakr al-Baghdadi.

Bavarian Interior Minister Joachim Herrmann said the man, who has not been named, also "announced an act of revenge against Germans because they were standing in the way of Islam."

Other jihadist propaganda was found on his phone, as well as his laptop, police say.

"Some Salafist content was found," Hermann added.

A total of two phones, several SIM cards and a laptop were discovered on the bomber's body and at his apartment, the minister added.

Police searching his home also found bomb-making equipment including petrol, hydrogen peroxide and batteries.

The 27-year-old failed asylum seeker wounded 15 people when he blew himself up in a suicide attack outside a restaurant in Ansbach, Bavaria.

AFP contributed to this report.

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