US President Donald Trump spoke with Egypt's President Abdel-Fattah El-Sisi by phone Friday, offering condolences to the Egyptian people after a deadly North Sinai mosque attack, the Egyptian presidency said.

During the call Trump condemned the deadly attack where at least 235 worshippers were killed and 102 others injured attending Friday prayers at Al-Rawdah Mosque in Al-Radwa village, North Sinai.

Trump added that the United States would continue to stand with Egypt against terrorism, calling on the international community to strengthen its efforts to defeat terrorism and extremism in all its forms.

Following news of the attack Friday, President Trump condemned the attack on Twitter, announcing that he would call the president of Egypt to discuss the "tragic" incident.

Egypt's security forces have been fighting an Islamist insurgency based in the northern part of the Sinai Peninsula that gained pace since the 2013 ouster of Islamist president Mohamed Morsi.

The insurgency has mostly targeted security forces, with attacks on military and police checkpoints commonplace.