New York, March 20 -- UN Secretary-General Antonio Guterres said on Friday there are grounds to believe that war crimes may have been committed by both sides in the ongoing Middle East conflict.

The warning comes after Israel attacked Iran's South Pars natural gas field on Wednesday, prompting Tehran to launch a retaliatory strike against a major energy facility in Qatar.

"If there are attacks either on Iran or from Iran on energy infrastructure, I think that there are reasonable grounds to think that they might constitute a war crime," Guterres told Politico in an interview.

He also highlighted the growing number of civilian casualties, saying both sides are vulnerable to potential accusations of war crimes.

"I don't see any difference...