The tomb also had an entrance to a secret tunnel hidden behind the sarcophagus, which Belzoni's team estimated to be 100 meters (328 feet) long. However, the tunnel was not truly excavated until 1961, when a team led by Sheikh Ali Abdel-Rasoul began digging in hopes of discovering a secret burial chamber containing hidden treasures. The team failed to follow the original passage in their excavations, and had to call a halt due to instabilities in the tunnel; further issues with permits and finances eventually ended Sheikh Ali's dreams of treasure, though they were at least able to establish that the passage was over 30 meters (98 feet) longer than the original estimate. In June 2010, a team from Egypt's Ministry of Antiquities led by Dr. Zahi Hawass completed excavation of the tunnel, which had begun again after the discovery in 2007 of a downward-sloping passage beginning approximately 136 meters (446 feet) into the previously excavated tunnel. After uncovering two separate staircases, they found that the tunnel ran for 174 meters (571 feet) in total; unfortunately, the last step seemed to have been abandoned prior to completion and no secret burial chamber was found.