A Syrian girl uses a rope to pull a cart her brother sitting on next to empty jerricans going to a water point to fetch water, in Azaz, on the outskirts of Aleppo, Syria.

An air strike on a water treatment plant in Syria last Thursday cut water supplies for 3.5 million people, and although pumping has been partly restored, 1.4 million still have reduced supply, the head of U.N. agency UNICEF in Syria said on Tuesday.

“In Syria, the rules of war, including those meant to protect vital civilian infrastructure, continue to be broken on a daily basis,” UNICEF’s representative in Syria, Hanaa Singer, said in a statement.

“The air-strike which reportedly hit al-Khafseh water treatment plant in the northern city of Aleppo last Thursday is a particularly alarming example.”

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