S Arabia vows to 'wipe terrorists from earth'

Saudi Arabia's crown prince vowed to "pursue terrorists until they are wiped from the face of the earth" as officials from 40 Muslim countries gathered Sunday in the first meeting of an Islamic counter-terrorism alliance.

"In past years, terrorism has been functioning in all of our countries... with no coordination" among national authorities, Prince Mohammed bin Salman, who is also Saudi defence minister, said in his keynote address to the gathering in Riyadh.

"This ends today, with this alliance."

The summit is the first meeting of defence ministers and other senior officials from the Islamic Military Counter Terrorism Coalition, which officially counts 41 countries and identifies as a "pan-Islamic unified front" against violent extremism.

The alliance was announced in 2015 under the auspices of Prince Mohammed, whose rapid ascent since his appointment as heir to the throne in June has shaken the political scene across the region.

The alliance groups largely, although not exclusively, Sunni-majority or Sunni-ruled countries.

It excludes Saudi Arabia's arch-rival, Shia-dominated Iran, as well as Syria and Iraq, whose leaders have close ties to Tehran.

The alliance meeting in Riyadh brings together Muslim or Muslim-majority nations including Egypt, the United Arab Emirates, Bahrain, Afghanistan, Uganda, Somalia, Mauritania, Lebanon, Libya, Yemen and Turkey.

Retired Pakistani general Raheel Sharif, who has been appointed commander-in-chief, also insisted that the coalition was not against any religion or state.

The alliance aims to "mobilise and coordinate the use of resources, facilitate the exchange of information and help member countries build their own counter-terrorism capacity," Sharif said.

While the alliance officially includes Qatar, which is the target of a six-month boycott led by Saudi Arabia, organisers in Riyadh said no Qatari officials were present at the meeting. Qatar's flag was also absent.

Egypt, which sent a military official and not its defence minister to Sunday's meeting, is reeling from a Friday attack on a mosque that killed more than 300 people during prayer time.

While IS has not claimed responsibility, Egyptian authorities say the organisation is the main suspect as the mosque is associated with followers of the mystical Sufi branch of Sunni Islam, whom IS has branded heretics.

Prince Mohammed said Friday's "painful event" was a reminder of the "danger of terrorism and extremism".