Rio police are using costumes at Carnival to blend into street crowds and catch cellphone thieves. On Friday, Carnival kicked off in Rio and many revelers worry about losing their phones.

Two people were arrested after a woman was spotted by a drone grabbing a phone from an attendee.

Mud-covered revelers took over the beach in Paraty, Brazil, on Saturday as part of a Carnival tradition that has grown steadily since it began 40 years ago. In the seaside town near the country's ...