Costa Rican authorities believe a partially decomposed body found Tuesday is Carla Stefaniak, a 36-year-old US citizen who was reported missing last week, said Walter Espinoza, of Costa Rica's Judicial Investigation Department.

Emails from top officials at the National Republican Congressional Committee were hacked during the 2018 midterm elections, Republican sources tell CNN, exposing the GOP's House campaign arm to an intrusion by an "unknown entity."