RALEIGH — There's a mystery that has Cadillac engineers very busy and owners baffled. Last Friday, the keyless remote systems on 1994 and 1995 Cadillacs were disrupted, affecting owners and dealers all over North and South Carolina.

At Thompson Cadillac-Oldsmobile in Raleigh, alarms started beeping and trunks started popping open all at the same time. And no one seems to know why it happened.

Cadillac owner James Williams says he'd like to know what's going on.

John Reeves of Thompson Cadillac says mechanics have to reprogram the keyless remotes and on some models they have to disconnect the system in order to reset it. But, he says, no one can explain it.

The interference, while it can be an inconvenience for owners, poses no safety hazard to drivers, and dealerships are reprogramming the remotes free of charge.

Cadillac engineers say there are three possible culprits: weather, ham radio operation and, most likely, some military transmission.