Dozens of people are reported to have been killed or injured following a bomb and gun attack during Friday prayers at a mosque in Egypt's Sinai peninsula.
The Ministry of Health earlier confirmed that 75 were injured in the attack, adding that the injured were transported to Bir al-Abed hospital in North Sinai. The affiliate also is believed to have been behind the 2016 downing of a Russian passenger jet that killed 226 people.
French Foreign Minister Jean-Yves Le Drian and British Foreign Secretary Boris Johnson also condemned the attack and expressed solidarity with Egypt.
Eyewitnesses said that the militants set fire in cars that belonged to residents and blocked the road in Al Rawdah Village. Egypt's presidency announced three days of mourning following the attack.
In a televised speech responding to the mosque bombing in Al-Arish that left 235 people dead, President Abdel Fattah Al-Sisi vowed to retaliate with "brute force" against perpetrators.
Egypt later said it would delay the opening of the Rafah border crossing to Gaza after the attack due to security concerns.
"Horrible and cowardly terrorist attack on innocent and defenseless worshipers in Egypt".
The Sinai branch is one of Islamic State's surviving branches following the collapse of its self-declared caliphate in Syria and Iraq after military defeats by USA -backed forces.
No one immediately claimed responsibility for the attack.
European Parliament President Antonio Tajani tweeted: "Heartbreaking loss of life in the cowardly massacre that took place in Egypt. Acts of barbarism and hatred in the name of God are acts against God himself".
Minister for Foreign Affairs of Sweden, Margot Wallstrom: "I strongly condemn the attack in Sinai, Egypt".
"We stand with Egyptians in their war against terrorism and against anyone who tries to harm the Egyptian national security", Palestinian Authority President Mahmoud Abbas said in a statement.