A small plane traveling to Costa Rica's capital of San Jose crashed on Monday afternoon, authorities said, killing five of the six passengers on board.

SAN JOSE, Costa Rica -- The sole survivor of a plane crash near Costa Rica’s capital, in which five other people died, is in serious condition in a hospital, the local Red Cross said on Tuesday. The 31-year-old woman was one of six people on board the small aircraft when it crashed southeast of San Jose.

Rescue workers trekked overnight across a remote mountain forest carrying a woman who had survived a crash that killed five of the six people aboard.

A small plane traveling to Costa Rica’s capital of San Jose crashed on Monday afternoon, authorities said, killing five of the six passengers on board. Firefighters said they had located the wrecked aircraft and confirmed that most aboard had died. A sixth person, who the Red Cross identified as a 31-year-old woman, is in critical condition.

A small plane carrying six people has crashed southeast of Costa Rica’s capital, but the condition of those aboard was not immediately known