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iStock/daboost(SAO PAULO, Brazil) —  Police in Brazil are poring over a surveillance video in hopes of identifying a group of thieves who stole gold and other precious metals from Sao Paulo’s airport.

At least six men with their faces covered disguised as federal police and heavily armed entered the cargo terminal at Sao Paulo-Guarulhos International Airport on Thursday and unloaded nearly 1,600 pounds of gold and precious metals bound for New York City and Zurich, Switzerland, authorities said.

“They subdued the guard at the entrance,” Assistant Police Chief João Hueb said during Friday’s news conference.

In video released by authorities, the thieves could be seen pulling up at the terminal and signaling for airport workers to load up a vehicle with the packages.

The thieves can be seen shoving the loot into a vehicle made to look like a real police truck. Afterward, the thieves took off in two trucks as the workers stood around watching.

The entire incident took about three minutes, authorities said.

Hueb described how the robbers had obtained access to internal information about the airport’s operations on Friday.

“During the investigation, we discovered that one of the employees at the airport had his family held hostage and that forced him to let the robbers into the airport and give them privileged information like schedules, the cargo quantity that was going to be transported, facilitating the robbers’ work,” he said.

The family and airport worker were not harmed and they were released by the gang.

The total haul was valued at more than $30 million, according to the Rio Times.

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