IS releases video that appears to show Ansbach bomber

GERMANY OUT - Police officers walk past a wall with a peace dove on a banner at the site of the attack in Ansbach, Germany,Tuesday July 26, 2016. In the most recent attack, a 27-year-old Syrian asylum-seeker set off a backpack laden with explosives and shrapnel Sunday night after being refused entry to a crowded music festival in the Bavarian city of Ansbach, killing himself and wounding 15 people. (Daniel Karmann/dpa via AP) (The Associated Press)

GERMANY OUT - Refugees from Syria stand near the site of the attack and hold up a sign reading 'we are Muslims and not terrorists' in Ansbach, Germany, Tuesday July 26, 2016. In the most recent attack, a 27-year-old Syrian asylum-seeker set off a backpack laden with explosives and shrapnel Sunday night after being refused entry to a crowded music festival in the Bavarian city of Ansbach, killing himself and wounding 15 people. (Daniel Karmann/dpa via AP) (The Associated Press)

GERMANY OUT -A broken window photographed at the site of the attack in Ansbach, Germany, Tuesday July 26, 2016. In the most recent attack in Germany, a 27-year-old Syrian asylum-seeker set off a backpack laden with explosives and shrapnel Sunday night after being refused entry to a crowded music festival in the Bavarian city of Ansbach, killing himself and wounding 15 people. (Daniel Karmann/dpa via AP) (The Associated Press)

The extremist Islamic State group has published a video in which a man pledges allegiance to IS and vows Germany's people "won't be able to sleep peacefully anymore." It appears to be the same as the one found by German investigators on the phone of man who blew himself, killing himself and wounding 15 people.

The IS-linked Aamaq news agency released the video early Tuesday. The man on the video, his face covered with a black scarf, threatens to make life intolerable and that "we will blow up your homes."

German authorities could not immediately be reached to confirm whether the video was the same as the one found on the cell phone of a 27-year-old Syrian who blew himself Sunday night in the Bavarian town of Ansbach.