Authorities have charged a member of the U.S. military who was arrested after trying to go through a security checkpoint at Midland International Airport with explosives in military-grade wrapping, the FBI said Sunday.

Trey Scott Atwater, 30, was stopped at security at MAF about 9 a.m. Saturday. FBI spokesman Mike Martinez said Atwater is being held at the Midland County jail and has been charged with trying to bring explosives onto an airplane.

However, a spokeswoman with the Midland County jail said Atwater was being held on a “federal offense” and was being held for the United States Marshals.

The spokeswoman also said the arresting authority was only listed as “Fed,” and was not which authority made the arrest.

He will remain in custody at least until his arraignment Tuesday, given that the courts are closed Monday for the holiday, Martinez said.

Atwater was not listed on the U.S. Magistrate docket Sunday; however, it was not clear when the docket was last updated.

Calls made by the Odessa American to the U.S. Marshals’ office in Midland were met with responses that offices would be closed until Tuesday. Calls and emails sent to Martinez were not returned.

Atwater, his wife and children had been visiting relatives in the area and were on their way back to his base in North Carolina.

Lt. Col. Tom Bryant, a public affairs officer for the Army Special Operations Command, confirmed that Atwater is assigned to the John F. Kennedy Special Warfare Center and School, which is at Fort Bragg, N.C.

“The Army and federal and local authorities are jointly investigating, and some point I’m sure there will be some additional information available,” Bryant said

Bryant said Atwater is currently with Special Forces, and that his rank is sergeant first class.

According to Odessa American reports, Atwater is a member of the Green Berets and was a 1999 graduate of Midland Lee High School. He joined the Army under the delayed-entry program at the Army Recruiting Station in Midland and went to Fort Benning in Columbus, Ga., for basic training. Records state Atwater has served at least three tours of duty in Afghanistan.

Public records searches list addresses for Atwater at Fort Bragg and indicate he continues to have relatives in Midland, though there was no answer at phone numbers given in both locations by the Odessa American or national media. Atwater had a reservation on Flight 3283 operated by American Eagle, which had a scheduled departure of 9:45 a.m. Saturday.

It’s unclear whether Atwater was in military uniform at the time he was detained, or how many explosives were in the bag. It was also unclear where the explosives were obtained.

City of Midland spokeswoman Tasa Watts said Saturday that she had no information on the suspect, but confirmed the explosives were in military-grade wrapping. She said the specific grade wouldn’t be known until the explosives were tested.

The Transportation Security Administration issued a statement saying one of its officers spotted a suspicious item in a carry-on bag during X-ray screening. The agency said the checkpoint was closed for about an hour while officers investigated and removed the item.

Watts said Atwater was entering a terminal when he was stopped, and a sweep was done to clear that terminal before normal operations resumed.

Court records show Atwater pleaded guilty in February 2002 in North Carolina to misdemeanor possession of a container of wine, liquor or beer by an unauthorized person, and to drinking beer/wine while driving.

Staff writer Nathaniel Miller contributed to this report.