No foreign parties have the right to comment on ousted President Mohamed Mursi's trial, an Interior Ministry spokesman has said.
It is unacceptable for any party to interfere in Egyptian affairs, said spokesman Badr Abdel Aati.
The Egyptian judiciary is handling the case and there is bigger understanding of the situation in Egypt, the state-run news agency MENA reported Abdel Aati as saying.
A Pentagon statement has said that Secretary of Defence Chuck Hagel has made a phone call last Thursday to Egypt's Defence Minister Abdel Fattah al-Sisi during which he expressed his concern towards the latest charges against Mursi and Muslim Brotherhood leaders.
Last Wednesday, the prosecutor general ordered the referral of Mursi and the Muslim Brotherhood's guide to a criminal court on charges of collaboration.