A train conductor died in a collision on a railway line serving a famous archaeological site, authorities said.

Two trains collided on a railway line at Peru’s famous Machu Picchu archaeological site, killing at least one person and injuring dozens.

Rail company Ferrocarril Transandino said a train operated by Peruvian Railways collided with another locomotive of Inca Railways on the single track linking the town of Ollantaytambo to Machu Picchu around lunchtime.

The deceased was the conductor of one of the two trains, according to the prosecutor’s office in Cusco, the city closest to the famous Inca citadel.

A health official said about 20 people were in relatively serious condition.

Images posted on social media shortly after the accident showed badly damaged locomotives facing each other on the track, broken glass strewn across the ground and injured people being treated on both sides of the track.

More than a dozen ambulances and paramedics were rushed to the scene in a remote part of the Andes with no direct road access.

Machu Picchu, a UNESCO World Heritage Site since 1983, receives an average of about 4,500 tourists a day, many of them foreigners, according to the Ministry of Foreign Trade and Tourism.

Built by the Incas in the 15th century, the site is famous for its perfectly fitted stone bricks and served as a refuge for the country’s emperor.

Most visitors take trains and buses to reach the historic sites high in the Andes.

The cause of the accident is unclear.