Egypt's newly formed Supreme Council to Combat Terrorism and Extremism will be tasked with issuing "decisions and procedures" to combat terrorism in accordance with a national strategy to fight the phenomenon, the presidency announced on Tuesday.

President Abdel-Fattah El-Sisi first mentioned the formation of the council in a late night speech to the nation on Sunday following twin terrorist attacks that targeted churches in Alexandria and Tanta, killing 46 people and injuring dozens.

Presidency spokesman Alaa Youssef said in a statement that the council will ensure participation by all segments of society, as well as develop security plans to face dangers.

The council will also aim to "rectify wrong perceptions used by the terrorist organisations to attract new recruits."

The council will include ministers and the heads of state apparatuses involved in fighting terrorism, as well as permanent committees that include public figures and experts "in all fields."

According to the statement, these figures should help in analysing terrorist organisations, as well as inspecting and tracking their activities and extremist ideologies domestically, regionally, and internationally.

They will also suggest security plans and legal strategies and follow up on their implementation.

A three-month nationwide state of emergency has been approved unanimously by parliament in response to Sunday's church attacks.