Iran intensified its attacks on its Gulf Arab neighbours' energy sites Thursday, hitting a Saudi refinery on the Red Sea and setting Qatari liquefied natural gas facilities and two Kuwaiti oil refineries ablaze as it struck back following an Israeli attack on its main natural gas field, a major escalation in the Mideast war that has sent global fuel prices soaring.

Saudi Arabia said a drone hit the country's SAMREF refinery in the port city of Yanbu on the Red Sea on Thursday.

Iran’s President Massoud Pezeshkian has warned that attacks on the country’s energy infrastructure could lead to “uncontrollable consequences” affecting the entire world.

Sirens were sounded across parts of Bahrain, with authorities urging citizens and residents to remain calm and move to the nearest safe place.

Qatar’s Ministry of Interior has reported a fire in the Ras Laffan area, which is home to the world’s largest LNG production facility, following what it described as “Iranian targeting”.

Saudi Arabia’s Ministry of Defence has said it intercepted and destroyed a drone that was attempting to approach a gas facility in the country’s Eastern Province.

Iran’s Islamic Revolutionary Guard Corps (IRGC) has issued a strong warning after attacks on its energy infrastructure, saying it will retaliate against those responsible.

Saudi Arabia has announced that Eid-ul-Fitr will be observed on March 20 after the Shawwal crescent moon was not sighted.