An explosion on a main road in Cairo has killed six police and wounded another three in what appears to be the deadliest attack on security forces in Egypt in several months.

Egyptian security officials say special forces killed nine members of the outlawed Muslim Brotherhood, including a former member of parliament, during a raid on a Cairo apartment.

A string of attacks has killed nine members of Egypt’s security and military forces in an apparent retaliation by Islamic militants a day after more than 50 supporters of the ousted president were killed in clashes with police.

A bomb blast outside the security headquarters in one of Egypt’s Nile Delta cities has wounded 19 people, raising fears of deteriorating security after president Mohammed Morsi’s removal.