NAPERVILLE, Ill. (WLS) — Human remains were found in a vehicle that was located during a training exercise Thursday morning in Naperville, police say.

Divers from the Naperville Fire Department were training in Lake Osborne, near the Naperville Public Safety Campus on Aurora Avenue, just before 11 a.m., when they found a submerged vehicle, police said.

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The car was removed from the lake about 3:40 p.m., and identified as a 1992 Nissan Maxima. The vehicle’s license plate is connected to an ongoing Berwyn Police Department investigation into the disappearance of Hiep Luu, who was reported missing in 2003, police said.

The human remains in the vehicle have not yet been identified.

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The investigation continues Friday.

Anyone with information in the death investigation is encouraged to call the Naperville Police Investigations Division at (630) 420-4138.

Anyone with information relevant to the missing person case should call the Berwyn Police Investigations Division at (708) 795-2160.