Iranian hackers infiltrated Qatar’s government networks, airlines and oil and gas firms as part of a two-year campaign targeting critical infrastructure around the world, according to a new report by a US cybersecurity firm.

While Cylance did not name specific victims, Reuters reported that Qatar Airways was among the targets of “Operation Cleaver.”

The attacks centered on the military, aviation, energy and transportation sectors, among others, in 16 countries that included fellow Gulf states Kuwait, Saudi Arabia and the UAE, according to the report.

Backing up previous remarks from US officials, Cylance also blamed Iran for a 2012 attack that took down the corporate computer systems and website of Qatar’s RasGas and Saudi oil giant Aramco.

The US firm warned that the impact of Iran’s campaign could go beyond network downtime and cause real-world damage.

Read the full story at Doha News.