Egypt has launched a criminal probe against deposed Islamist President Mohamed Morsy for alleged spying, inciting violence and ruining the economy, in a blow to thousands of his supporters who have been staging a sit-in here demanding his reinstatement.

Egyptian prosecutors on Saturday announced the criminal investigation against Mr. Morsy and several other leading Muslim Brotherhood figures, including the Islamist movement’s top leader Mohamed Badie.

61-year-old Mr. Morsy, Egypt’s first democratically elected President, was toppled by the powerful military early this month and since has been kept under detention along with some senior aides of his Muslim Brotherhood party.

Mr. Morsy was last seen in public on June 26, and has been held at an undisclosed location.

A Foreign Ministry spokesman, earlier this week had said, Mr. Morsy is in a “safe place” following his ouster.

The prosecutors said they were examining complaints of spying, inciting violence and ruining the economy against the leaders.

In a statement, the public prosecutor’s office said it had received complaints against Mr. Morsy and eight other Islamist figures including Mr. Badie. It did not identify other Islamist leaders.

The military maintains it deposed Mr. Morsy in a justified response to popular demand after millions of people demonstrated against him. The Brotherhood claims it was a coup that reversed democracy.

Complaints such as those against Mr. Morsy are a first step in the criminal process, allowing prosecutors to begin an investigation that can lead to charges.

The prosecutors did not say who had made the complaints.

Egyptian law allows them to investigate complaints from police or any member of the public.

Mr. Badie and several other Brotherhood officials already face charges for inciting violence that were announced earlier this week, but few of them have been arrested.

Mr. Morsy’s Brotherhood party on Saturday called for more mass demonstrations after a huge march broke up peacefully before dawn, ending a week in which at least 90 people were killed.

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