Thieves stole tens of millions of dollars from a Los Angeles cash storage facility on Easter Sunday, with their crime only discovered the next day.
The stealing of at least $30m (£24m) is one of the biggest cash heists in LA history, local media reported.
There are few clues as to who carried out the crime, which was been described as “elaborate”, or how.
The Los Angeles Police Department and FBI are jointly investigating it.
No alarms were tripped and no one knew thieves had entered the facility, located in the San Fernando Valley, where cash from local businesses is processed and stored in a vault.
A crew of sophisticated burglars is believed to have come in through the roof, according to local media. Only a small group of people were aware so much cash was held in the building.
It took until Monday, when facility employees opened the vault, to realise that the massive sum was missing.
The safe did not show any outward sign of break-in.
The total surpasses any that has been taken in armoured vehicle robberies in the area, according to the Los Angeles Times.
