CASPER, Wyo. — A delivery truck driver was taken for questioning Thursday after security at the Wyoming Air National Guard base in Cheyenne found explosive residue on the driver’s hands and in the vehicle, a guard spokeswoman said.
The discovery prompted the guard to cordon off an area within 1,000 feet of the truck, forcing the evacuation of part of the base and closing a normally busy street in the capital city. A package containing an antenna was found in the truck, but no explosives, said Wyoming Military Department spokeswoman Deidre Forster.
The driver was held in a security vehicle until the FBI took him for questioning. Forster had no information on the identity of the driver, who she said was cooperating with authorities.
Bureau spokesman Dave Joly confirmed that FBI personnel responded to the scene. In an email to the Star-Tribune, Joly said he could not provide additional information on the driver. He referred other questions to the air guard, which said it didn’t have any additional details.
Officials temporarily closed a section of Dell Range Boulevard about 11:45 a.m. — when the incident began — and one of the runways at Cheyenne Regional Airport, which is home to several units of the air guard.
The runway closure did not disrupt flights at the airport, said Deputy Director of Aviation Jim Schell. The main runway remained open.
People at the base who were outside the 1,000-foot cordon could not leave until it was deemed safe. The closures lasted until about 1 p.m. when authorities determined the truck and the package did not pose a threat.
Members of the 153rd Security Forces Squadron discovered the explosive residue while the truck was attempting to enter the base’s front gate. During a routine check, the driver’s hands and the truck’s shifter tested positive for explosives, Forster said.
No other explosives were detected and no one was injured in the incident.
In a second bomb scare about the same time, Cheyenne police responded to a report of a suspicious package at Mount Sinai Synagogue. A synagogue member found the unmarked package by the door of the building, according to a statement on the police department’s Facebook page.
A bomb squad responded to the scene and determined the box contained several books and a radio.