CAIRO, Jan 31 (Aswat Masriya) - Egypt's President Abdel Fattah al-Sisi established on Saturday a unified command to combat terrorism east of the Suez Canal, following deadly militant attacks in Sinai.

At least 30 people were killed and 50 others were injured late Thursday in four separate attacks against security installations in the governorate.

Egypt's Supreme Council of the Armed Forces (SCAF) announced the presidential decree establishing the command, which is effective as of today. Sisi promoted Third Field Army Commander Osama Roshdy Askar to lieutenant general, who will be in charge of the command.

This unified command will oversee Sinai and the second and third field armies, a military source said. He added that Sisi's decree is the first of its kind since the 1973 October war, signalling qualitative development in confronting terrorism in Sinai.

The announcement comes following Sisi's meeting with SCAF today morning following the deadly attacks in Sinai which left at least 30 dead.

Sisi cut short his trip to Ethiopia on Friday after the attacks. The president was heading an Egyptian delegation attending the African Union Summit in Addis Ababa.

Addressing the Thursday attack, Sisi said on Friday that Egypt is "paying the price" for fighting terrorism and extremism, state-run MENA reported.

The meeting between Sisi and SCAF is held to discuss "military and security details", a military source said. The council is studying a plan to combat the "qualitative development of terrorist operations in Sinai," despite "the success of daily strong blows to terrorist hotbeds." 

The attack is the deadliest since a similar one on the Peninsula last October. At least 30 military personnel were killed in a suicide operation which targeted a security checkpoint in Sinai's Sheikh Zuweid on October 24, 2014.

Following the October attack, Sisi declared a three-month state of emergency and a night-time curfew in parts of Sinai. The curfew was extended for three more months last week; it is due to last until April 25.

Egypt's cabinet also issued a decision to clear 500 metres of Sinai's border area to create a "buffer zone", in response to the October attack. The area was doubled to 1,000 metres in November, 2014.

Egypt's most active militant group, Ansar Bayt al-Maqdis, claimed responsibility for Thursday's deadly attack, as well as last October's attack. The group changed its name to Sinai Province after pledging allegiance to Islamic State fighters in Syria and Iraq last November.

Militants have stepped up attacks targeting security forces in Sinai, as well as other parts of the country, since the military ouster of Islamist President Mohamed Mursi in July 2013, which followed mass protests against his rule.