"There is no truth to reports that former president Hosni Mubarak has left Egypt for Tabuk in Saudi Arabia," the country's military rulers said in a statement on Facebook.
"He is under house arrest, with his family, in Egypt," it said.
The council has ruled Egypt since Mubarak was forced to quit on February 11 after 18 days of massive street protests against his 30-year autocratic regime.
On March 3, Egypt's prosecutor general denied media reports that Mubarak was in Saudi Arabia, insisting that he was at the family retreat in the Red Sea resort of Sharm el-Sheikh.
Media reports suggested that Mubarak had gone to Tabuk to receive medical treatment. The state-owned daily Al-Akhbar claimed Mubarak, 82, was receiving medical treatment for cancer.