JACKSONVILLE, Fla. -- Nearly five hours after officers were called to the scene of a bomb threat in downtown Jacksonville, authorities announced no bomb nor explosive device was found in the area.

A 10-block area of downtown that was shut down Sunday afternoon reopened at about 6 p.m. after a bomb squad responded to an incident at intersection of West Forsyth Street and North Laura Street.

The incident began when a witness called authorities around 11:45 a.m. to report a man who was behaving strangely in the middle of the street, Jacksonville Sheriff's Office spokeswoman Lauri-Ellen Smith said.

"According to witnesses, he made a bomb threat and was speaking in Arabic which an officer at the scene recognized," Smith said. "JSO responded immediately, and is treating this incident seriously because it involves a bomb, a reference to a vehicle, and in light of what happened in the United Kingdom and Scotland earlier in the weekend,"

At 5 p.m., Sheriff John Rutherford told Channel 4 that no bomb was found.

"The vehicle at the scene that we thought might have contained an explosive device has been cleared by our bomb squad. There is no danger now at that location," Rutherford said.

Police confirmed that the man involved was taken into custody for questioning by the Terrorism Task Force, but have not released his name or if he is charged with a crime.