There was some filthy business at the United Nations yesterday.

Diplomats — and 150 visiting schoolkids — were evacuated from the UN Security Council and General Assembly when an especially stinky, “suspicious odor” from a burst sewer line filled the area, officials said.

A sewer pipe in the basement may have been disrupted by high tide in the East River, deputy spokesman Farhan Haq said.

The evacuation interrupted a ceremonial session at the Security Council, where children were supposed to address the diplomats.