Saudi Arabia, UAE, Bahrain and Egypt have cut diplomatic ties and all land sea and air contacts with Qatar, accusing the Persian Gulf country of supporting terrorism and interfering in their internal affairs.
The Saudi state news agency, citing an official source, said on Monday Riyadh "urges all brotherly countries and companies to do the same."
The kingdom said it made the decision, "proceeding from the exercise of its sovereign right guaranteed by international law and the protection of national security from the dangers of terrorism and extremism."
The United Arab Emirates gave Qatari diplomats 48 hours to leave the country, citing their "support, funding and embrace of terrorist, extremist and sectarian organizations," state news agency WAM reported.
Bahrain news agency said the tiny kingdom was cutting ties with Doha over its insistence on "shaking the security and stability of Bahrain and meddling in its affairs."