The majority of those killed in the attack are civilians.
No group immediately claimed responsibility for the attack.
El-Sisi said that Egypt is facing terrorism alone, on behalf of the region and the whole world, and said that events in Sinai are "an attempt to break our will", and to end Egypt's efforts "to terminate the terrorist plan that is aiming to destroy what is left of the region". Sufis are considered by Islamic fundamentalists to be apostates and are frequently the target of Islamic militants.
Witnesses said bomb explosion ripped through the Rawda mosque as worshippers gathered for weekly Friday prayers.
The attack started when an explosive went off in a building adjacent to the mosque, and gunmen fired at worshippers as they fled, eyewitnesses told CNN.
President Donald Trump, in a tweet, called the attack "horrible and cowardly terrorist attack on innocent and defenseless worshipers in Egypt".
"The world can not tolerate terrorism, we must defeat them militarily and discredit the extremist ideology that forms the basis of their existence!" the president said.
Sisi, a former armed forces commander who presents himself as a bulwark against Islamist militancy, convened an emergency meeting with his defence and interior ministers and intelligence chief soon after the attack.
"There is no difference between terrorism harming Egypt and terrorism harming other countries".
A tribal leader and head of a Bedouin militia that fights IS said that the mosque is known as a place of gathering for Sufis.
Local militant group Ansar Bayt al-Maqdis, once allied to al-Qaida, split from it and declared allegiance to Islamic State in 2014.
Islamic militants stepped up their campaign of violence in northern Sinai after the military ousted the Muslim Brotherhood from power in 2013.
Joseph had said earlier this month it "wouldn't be fair" to play Lynch when Lynch had just returned to the practice field. Sunday against the Bengals was the first game this season in which Lynch was active following his lengthy recovery.
NEW YORK, NY - MAY 17: Norah O'Donnell, Charlie Rose and Gayle King attend the 2017 CBS Upfront on May 17, 2017 in New York City. It is crushing". "I have learned a great deal as a result of these events, and I hope others will too".
Asked about next term, the 36 year-old stated: "Right now, I'm just grateful to be able to play football again". Sooner or later, Lukaku is going to have to tell him, no you get on the right wing, I'm the £90m centre forward.
Per Mark Schlabach of ESPN , the head coach is poised to either take the UCLA Bruins or Florida Gators job in the coming days. Kelly, however, is considering offers from both University of Florida and UCLA, according to USA Today's George Schroeder.
The new version will have the phones laid flat, allowing them to be used as a trackpad or virtual keyboard. Even better, the new phone could feature a design change from the S8. that will please a lot of users.
It has acquired stakes in both Tesla and Snap, and invested in numerous start-ups in Asia including India's Uber rival Ola. This is a huge win for the company as Tencent Holdings Ltd. now has a market value that is more than that of Facebook .
Jadhav has filed an appeal with Pakistan Army chief General Qamar Javed Bajwa to seek clemency, which is still pending. Earlier this month, Pakistan offered to arrange a meeting between Jadhav and his wife on "humanitarian grounds".
Meanwhile, PASS also seems heading for a vertical split with a group charging Banmbhaniya of hobnobbing with the BJP and the NCP. Citing various Supreme Court judgements, the BJP leader said it was not possible to exceed the cap set by the apex court.
The Washington Post reported that the foundation spent $258,000 to settle lawsuits against Trump's for-profit businesses. During that year's presidential race, the charity made more donations than it had from 2012 through 2015 combined.
Padmavati : Rajput group threatens protests in UK!
The court will hear an advocate's plea against the release of the movie in the foreign countries on Tuesday, November 28. The movie which is directed by Sanjay Leela Bhansali and jointly produced by Bhansali and Viacom 18 Motion Pictures.
Ryan student murder: Bus conductor released from jail
The Haryana Police had claimed that the child was murdered by the bus conductor allegedly after he failed to sodomise the boy . He also also told that there has been havoc all over India because of the murder and he must take responsibility of it.
Clippers lose Beverley for rest of way
Beverley's absence means that the Clippers will be relying more on guards Austin Rivers and Lou Williams . The big man is now averaging 10.5 points, 13.8 rebounds and 1.2 blocks per game on 66.1 percent shooting.
Two Boeing 747 Jumbo Jets Auctioned in Taobao
This was the first time jets have been sold via online judicial auction in China, according to the court. Two Boeing 747s have been sold on Chinese website Taobao , which is the country's equivalent of eBay.