Militants killed more than 230 people at a mosque in Egypt's North Sinai on Friday, detonating a bomb and gunning down worshippers in the deadliest attack in the country's modern history, state media and witnesses said.
He added in his tweet "The world can not tolerate terrorism, we must defeat them militarily and discredit the extremist ideology that forms the basis of their existence". Egypt's presidency has also declared a three-day mourning period, Egyptian state news agency MENA reported.
The BBC reported Egyptian President Abdul Fattah al-Sisi will meet with security forces Friday. The attackers targetted those offering their weekly prayers in the mosque situated in the al-Rawda area near the provincial capital of El-Arish. The blast occurred during Friday prayers, when the complex was packed with worshipers.
The gunmen then mowed down panicked worshippers as they attempted to flee and used the congregants' vehicles they had set alight to block routes to the mosque.
"In this hour of tragedy, the government and the people of India stand by the government and the people of Egypt", he said.
Appalled by the sickening attack on a mosque in North Sinai.
In March 19 2016 13 Egyptians policemen were killed by ISIL-SP during an attack in the El-Arish checkpoint, Arish is the largest city in Sinai.
UK Prime Minister Theresa May: Appalled by the sickening attack on a mosque in North Sinai.
In a statement afterward, el-Sissi said the attack "will not go unpunished" and that Egypt will persevere with its war on terrorism.
Striking at a mosque would be a change in tactics for the Sinai militants, who have usually attacked troops and police and Christian churches. Condolences with all those in #Egypt affected by this evil and cowardly act.
Palestinian President Mahmoud Abbas also strongly denounced the terror attack, voicing his solidarity with Egypt.
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".