The military-backed government in Egypt has blamed the Muslim Brotherhood for the attacks on a police HQ earlier this week.
They have also declared Muslim Brotherhood as a terrorist group.
The group, whose candidate Mohammed Morsi won the presidential poll last year before being deposed by the military, had already been outlawed.
Deputy Prime Minister Hossam Eissa announced the move, saying that those who belonged to the group, financed it or promoted its activities would face punishment.
He said the decision was in response to Tuesday’s suicide bombing of a police headquarters in Mansoura, in the Nile Delta, which killed 16 people and wounded more than 100.
“Egypt was horrified from north to south by the hideous crime committed by the Muslim Brotherhood group,” Mr Eissa said.
“This was in context of dangerous escalation to violence against Egypt and Egyptians and a clear declaration by the Muslim Brotherhood group that it still knows nothing but violence.
“It’s not possible for Egypt the state nor Egypt the people to submit to the Muslim Brotherhood terrorism.”
Isn’t this a good way to stay in power?
Source: BBC News