An explosive device was found in a passenger's carryon bag as the man passed through a checkpoint, and federal agents arrested him, the FBI said Thursday.

Officials have found no apparent connection between Charles Alfred Dreyling Jr. and any terrorist group or activity, said Agent Gary Johnson, an FBI spokesman.

Dreyling, 24, was going through the security checkpoint at Will Rogers World Airport on Wednesday when a Transportation Security Administration employee noticed something suspicious in his bag on the X-ray machine, Johnson said.

Johnson said Dreyling had "an improvised explosive device." He declined to describe it further.

Dreyling, who lives in Norman, had planned to take a Delta flight that travels to Philadelphia through Atlanta, airport spokeswoman Karen Carney said.

He was at the Oklahoma County jail on a federal hold and was to appear before a federal magistrate Thursday afternoon, the U.S. Attorney's office said. He could face charges related to possessing an explosive device at an airport, Johnson said.

The arrest did not disrupt any flights, Carney said.