Workers at a BP oil refinery in northwest Indiana made a startling discovery Wednesday when they came upon two dead monkeys inside a shipping crate.

The overseas shipment was to contain equipment for the Whiting, Ind. refinery's modernization, but instead, the crate contained the remains of two small monkeys that were less than 2 feet tall, the Northwest Indiana Times reports.

Scott Dean, a BP spokesman, told the Associated Press that the refinery -- located about 15 miles southeast of Chicago -- likely received the shipment containing the animals from India.

The refinery has followed Centers for Disease Control guidelines in disposing of the monkeys and a BP spokesman said that, although the area was briefly evacuated, the health of either their workers or the surrounding community was never at risk in the incident, WGN reports.

The crate had reportedly been stored inside a warehouse for some time before it was opened Wednesday.