A 23-year-old man from Anjo, Aichi Prefecture, was arrested in Shizuoka Prefecture, early Monday morning after trying to steal a police car that had police officers inside it.

According to police, Ushio Sato, a company employee, approached the vehicle -- which was an unlocked unmarked police car -- at a parking lot in Numazu, at around 12:30 a.m. Monday, but was shocked to see some police officers inside it when he opened the door, Sankei Shimbun reported.

Sato tried to flee, but was soon caught by one of the officers and arrested on the spot for attempted theft.

The vehicle, according to police, was being used as part of an undercover investigation.

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