Scientists have spent months searching for hidden rooms inside the pyramids using non-invasive methods. They recently announced to the public new findings in two well-known Egyptian pyramids.

In the last three months, a team from Egypt, Canada, France and Japan has scanned four pyramids with thermal imagers looking for unknown structures or cavities.

Operation Scan Pyramids began on October 25, 2015. The Cheops Pyramid, Rachef's Pyramid at Giza, the Broken Pyramid, and the Red Pyramid at Dashur were examined.

The project is expected to continue until the end of 2016. It includes non-invasive infrared thermography, muon radiography and 3D reconstructions.

Scientists have published new finds on several limestone blocks of the western wall of the Red Pyramid and the northern wall of the Cheops Pyramid.

Matthieu Klein of Laval University in Canada said at a press conference: "There is a clear difference in temperature on the north side of the pyramid - the bottom is colder than the top. It's interesting and we have no explanation for it, there is a difference of 3 to 6 degrees Celsius.

Klein claims that the team located two anomalies on the north wall of the Cheops Pyramid. They will provide further information only after the analysis of research data.

"The first results show that we have good news," said Mamduh al-Damati. "We will have to solve a lot of mysteries, but it is almost too early for us to express ourselves."