A 4,500-year-old chamber has been uncovered in the Pyramid of Khufu in Egypt.

The corridor which measures nine metres (30ft) long and more than six feet wide was discovered close to the main entrance of one of the three pyramids at Giza and archaeologists are puzzled as to what the chamber was used for.

The ScanPyramids project, which has been ongoing since 2015, used high-tech equipment to unearth the chamber, located on the northern side of the Pyramid of Khufu in Egypt.

Christian Grosse, Professor of non-destructive testing, said various scanning techniques were deployed to locate the chamber, including ultrasound measurements and ground penetrating radars and scientists detected the corridor using advanced radiography. They collected images of it by feeding a tiny endoscope through a miniature join in the pyramid’s stone.

Grosse said: “There are two large limestones at the end of the chamber, and now the question is what’s behind these stones and below the chamber?”

Egyptian antiquities officials said the discovery could lead to further findings. And they will continue scanning so they can uncover what is beneath the corridor.