INDIANAPOLIS --
Security officials closed one concourse at the Indianapolis International Airport for about an hour early Wednesday because of a suspicious package that police said turned out to be inert training explosives.
About 500 travelers were evacuated shortly after 5 a.m. but were soon allowed to return, said airport spokeswoman Patzetta Trice.
Airport Police Maj. Tom Hanna said the evacuation was ordered because of the discovery of a vest containing what he described as "inert training explosives" in a tray on a conveyor belt at a security checkpoint.
Hanna said passengers were never at risk because the explosives were inactive. Hanna declined to speculate on where the vest might have come from, including whether it might have belonged to an airport security official.
"We're not ready to disclose that at this point due to the ongoing investigation," he said.
About a dozen U.S. Airways and United Airlines flights were listed as delayed.
