COLUMBIA, Mo. (AP) — Columbia police say a 50-year-old man is being held in a secure facility after an explosive device was found in a car trunk during a domestic dispute.

Police spokeswoman Bryana Maupin said Thursday the man hasn’t been arrested as the investigation continues.

The Columbia Daily Tribune reports police were called to the Columbia Orthopaedic Group on Tuesday to investigate a dispute between a husband and wife. The couple had left by the time officers arrived but when the woman returned, officers found the explosive device in the trunk. It was later detonated by a bomb squad.

Police did not indicate if the woman was injured while with the suspect, or what type of explosive was found.