During a search in a Texas jail, arresting officers somehow overlooked a loaded gun inside a woman’s bra, police say.

Police in Austin say an investigation is ongoing into how the loaded handgun slipped past officers during her arrest for driving while intoxicated on May 29, the Austin American-Statesman reports.

“We have training and protocols to address the appropriate techniques of frisking and searching suspects,” Austin’s interim police chief, Brian Manley, told the newspaper. “The dangers posed by missing a weapon on a suspect cannot be overstated.”

A female corrections officer at the Travis County Jail found the gun during a routine search of the woman, who was not identified. The gun was then given to arresting officers and jail staffers notified police in Austin as part of their response, a sheriff’s spokeswoman told the newspaper.

The incident happened about five months after a 19-year-old suspect who was arrested for shoplifting at a mall used a gun that somehow eluded arresting officers to kill himself in the back of a police cruiser. An investigation into the incident following Zachary Khabir Anam’s death has not been completed, the American-Statesman reports.

Just one gun and one stun gun were found by corrections officers after they went undetected by arresting officers from 2013 through last year, according to records from the Travis County Sheriff’s Office cited by the newspaper.