Egyptian supporters of deposed president Mohamed Morsi sit in front of barbed wire fencing that blocks the access to the Republican Guard in Cairo.
According to presidency spokesperson Ahmed Elmoslmany, violent clashes that led to at least 42 deaths in front of Egypt's Republican Guard on Monday would not derail efforts to form a new interim government.
"What happened will not stop steps to form a government or the [political] roadmap," he said.
Egypt's interim administration also expressed "deep regret" for those killed on Monday, it said in a statement carried on the state news agency.
The statement said the deaths were the result of an attempt by protesters to storm the Republican Guard headquarters. Islamist demonstrators blamed the 42 deaths on the military.
The transitional administration also said it had formed a judicial committee to investigate the events.
The statement called on protesters not to approach any military or "other vital installations".
'Dire need' of reconciliation
Meanwhile on Monday, the Muslim Brotherhood said the chief of the armed forces wanted to drive Egypt to the same fate as Syria after deaths of the 42 people.
Holding General Abdel Fattah al-Sisi responsible, the group described the shooting as a "horrible crime" in a statement posted on Facebook.
Also on Monday, Egypt's liberal politician Mohamed ElBaradei said the country was in "dire need" of reconciliation and condemned all violence on Monday.
"Violence is not the approach no matter what its source, and it must be strongly condemned. I call for an immediate independent and transparent investigation. Egypt is in dire need of reconciliation," he wrote on Twitter.
The Muslim Brotherhood said its supporters were fired on outside the headquarters of the Republican Guard in Cairo. The military said the Islamists attacked the building, where deposed president Mohamed Morsi was being held.
Morsi was overthrown by the Egyptian army on July 3 following protests in the North African country.– Reuters