CAIRO — Egypt’s military-backed interim government on Wednesday declared the Muslim Brotherhood a terrorist group, criminalizing all its activities, its financing and even membership to the group from which the country’s ousted president hails.

The announcement is aimed at crippling the Brotherhood and poses a dramatic escalation of the fight between the government and group, which has waged near-daily protests since the July 3 popularly backed military coup that toppled President Mohammed Morsi.

Hossam Eissa, the Minister of Higher Education, read out the Cabinet statement after long meeting. Eissa said that the decision was in response to Tuesday’s deadly bombing targeting a police headquarters in a Nile Delta city which killed 16 people and wounded more than 100. The Brotherhood has denied being responsible for Mansoura attack and an al-Qaida inspired group has claimed responsibility for the suicide bombing on Wednesday.

“Egypt was horrified from north to south by the hideous crime committed by the Muslim Brotherhood group,” Eissa said.