RIO DE JANEIRO, Brazil - A police officer is recovering after he and two others sent to Rio de Janeiro for the Olympics were shot after getting lost near a slum.

The officers from Brazil's national security force were using a GPS device to navigate unfamiliar streets when they took a wrong turn off a highway leading to Rio's international airport.

The truck they were traveling in was met by gunshots and one officer was shot in the head. The Justice Ministry said Thursday that the officer is recovering from a four-hour surgery and was in stable condition but that the next 48 hours would be key.

A commando unit backed by a police helicopter was preparing Thursday to carry out an operation to apprehend those behind the attack.