A 25-year-old man described as an Islamic extremist was arrested in a plot to attack sites around Tampa, Fla., after taking possession of disabled guns and bombs, authorities said Monday.

The U.S. Department of Justice said Sami Osmakac, a naturalized U.S. citizen who was born in the former Yugoslavia, was arrested Saturday night.

He has been charged with one count of attempted use of a weapon of mass destruction. His first appearance in federal court is scheduled for Monday at 2 p.m. ET.

Sources close to the investigation told Fox News that Osmakac was being “closely monitored by law enforcement” for months in what authorities have described as a “sting operation.”

Federal officials said a confidential source told them that Osmakac wanted Al Qaeda flags. The federal complaint alleges Osmakac gave the agent a $500 down payment for an AK-47, multiple homemade explosive grenades and the explosive belt so he could attack various locations in Tampa.

Osmakac had created a “martyrdom video” and tried on a bomb belt before being arrested Saturday, law enforcement officials said.

(Source: Fox News)