Egyptian President Abdel Fattah al-Sisi’s first visit to Oman that was scheduled to take place on Sunday is postponed because of the Sinai mosque bombing in Al-Arish, RIA Novosti reported.

On Saturday, President Abdel Fattah Sisi ordered the construction of a mausoleum in memory of the people killed in the attack.

Egypt said an attack on a mosque by militants in the country's troubled region of northern Sinai has killed 305 worshippers, including 27 children, a dramatic increase in the death toll previously announced, which was 235.

A statement by the country's chief prosecutor, Nabil Sadeq, said the attack Friday left another 128 people wounded.

It said the attackers, estimated at between 25 and 30, arrived at the mosque close to the small town of Bir al-Abd in five all-terrain vehicles and positioned themselves at the main door and the facility's 12 windows before opening fire. They also torched seven cars parked outside the mosque, which belonged to worshippers inside.