(CNN) An armed gang of 10 stole about $15 million in cash after raiding a security van at an airport in Santiago, Chile, on Monday.

The heist took place at about midday local time (11 a.m. ET), when a group of 10 entered the cargo area of Arturo Merino Benítez International Airport and targeted a van belonging to security firm Brinks, according to CNN affiliate CNN Chile

The gang passed themselves off as workers from delivery firm DHL, entering the airport in a vehicle in the company's red and yellow livery, before threatening security guards and leaving one person injured after hitting them, reports CNN Chile.

Jorge Sánchez from Chile's Policia de Investigacion (PDI) gave a press conference on Monday following the heist, revealing that $14 million and one million euros in cash had been stolen.

Sánchez said the criminals may have had inside information that enabled them to carry out the heist, adding that the crime was carried out by professionals.

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