Syrian refugees stranded along the Jordanian border say clean water is getting scarce in their desert tent camp after the area was sealed by Jordan in response to a deadly cross-border attack.

Cellphone footage taken in the Ruqban camp on Wednesday showed refugees chanting, "We want water." Three Ruqban residents said by phone that people have begun drinking polluted water.

Tens of thousands of refugees in the area depend on daily deliveries of food and water by international aid agencies based in Jordan.

Jordan sealed the area on Tuesday, after a car bomb attack launched from the Ruqban area killed six Jordanian troops and wounded 14.

The U.N. refugee agency said Wednesday that Jordanian authorities approved plans to deliver water to the camps, but did not provide details.