Egypt's public prosecutor has issued a travel ban on ousted President Hosni Mubarak and his family.
The order also freezes their money and assets, a spokesperson for the prosecutor's office said.
Mr Mubarak stepped down on 11 February, after almost 30 years in power in the wake of mounting public protests.
He is believed to be in poor health, living in his villa in the resort town of Sharm el-Sheikh, but has not been seen or heard of publicly since stepping down.
He handed power to the military, which appointed an interim government to write a new constitution and hold elections.
The prosecutor's office said the travel ban and asset freeze was issued while complaints - which were not specified - against the Mubarak family were being investigated, Reuters news agency reports.