OKLAHOMA CITY (AP) -- A University of Oklahoma student was released on $10,000 bail Thursday after appearing in federal court to be formally accused of a felony for allegedly bringing a small explosive device into Will Rogers World Airport.

Federal agents arrested Charles Alfred Dreyling Jr., 24, on Wednesday at a security checkpoint after a Transportation Security Administration employee noticed something suspicious in his carryon luggage as it went through an X-ray machine about 9:30 a.m., FBI spokesman Gary Johnson said.

The device was described in an FBI affidavit as a carbon dioxide cartridge filled with gunpowder that could be detonated when connected to a power source such as the batteries Dreyling had in his electric razor and in his cell phone, which were also in his carryon bag.

An FBI bomb technician concluded the device could detonate with sufficient force to cause serious injury.

Dreyling faces a federal charge of trying to get on an aircraft with an explosive device. The charge carries a maximum penalty of 10 years in prison and a $250,000 fine.

He was released to the custody of his mother, Vicki Dreyling. His terms of release include living at his parents' home in north Oklahoma City and a 10 p.m. curfew.

Dreyling appeared in federal court wearing an orange Oklahoma County jail jumpsuit and orange flip-flops. About twenty friends and family members attended the hearing in a show of support for Dreyling.