Authorities in Bulgaria have released video footage of a man they suspect carried out Wednesday's deadly suicide attack on a bus carrying Israeli tourists.

Bulgaria's Interior Minister Tsvetan Tsvetanov said Thursday that the suspected bomber, wearing shorts and carrying a backpack, looked like any other tourist. While the suspect has not been identified, Tsvetanov said he was carrying a fake driver's license from the U.S. state of Michigan.

Investigators have the suspect's fingerprints and are testing his remains for DNA.

The attack in the Black Sea city of Burgas killed six people — five Israelis and the local driver. The blast seriously wounded at least two others.

No one has claimed responsibility for the blast, but Israeli officials have blamed Iran and the Lebanese Shi'ite Muslim group Hezbollah. Tehran has denied the allegations.