Egypt's ousted president, Mohammed Morsi has described Wednesday's announcement by the army as a "coup", dpa reported.
"Pres. Morsi: Armed Forces announcement is rejected by all free men who struggled for a civil democratic Egypt," according to a statement on his verified Twitter account.
"President Morsi urges everyone to adhere to peacefulness and avoid shedding blood of fellow countrymen," it added.
It was not immediately clear who issued the tweets, with Morsi reportedly in a "safe location" controlled by the army.