U.S. explosives experts on Thursday joined South African police searching for evidence after the bombing of Cape Town's Planet Hollywood restaurant earlier this week.

Police spokesman Wicus Holtzhausen told Reuters investigators from the U.S. Federal Bureau of Investigation (FBI), who helped investigate the bombing of the U.S. embassy in Nairobi earlier this month, arrived at the scene.Bouquets of flowers were stuck in the razor wire ringing the U.S.-franchised Planet Hollywood restaurant in the city's Waterfront tourist district, where one man was killed and 27 people were injured in the blast on Tuesday evening.

"What now, South Africa?" read a note attached to a bunch of wilting yellow carnations. "It's about time we stand together to rid our country of the scum that are ruining it."

The Cape Times newspaper reported that police had video footage from the restaurant's security camera showing "a swarthy man of average height standing at a bar counter shortly before the horror bomb exploded."

The newspaper quoted unidentified sources as saying the suspect was "Moroccan-looking" from Zimbabwe and that he had links with a local extremist group.