AMMAN, Jordan (AP) -- A tour bus collided with a water tanker in northern Jordan Saturday, killing at least 21 people, the official Petra news agency reported.

At least 33 others were wounded, including three people in critical condition, Petra said quoting police spokesman Mohammed al-Khatib.
The tour bus, which was operated by the privately owned Jordanian Trust Co., was traveling from the northern town of Jerash to Irbid, located 55 miles north of the capital, Amman, when it crashed with the tanker and overturned into a valley.
The bus fell 108 feet before landing on the valley floor, the agency reported.
Police were investigating the accident, which was believed to have involved mainly Jordanian citizens, al-Khatib said. It was not immediately clear if other foreigners were injured or killed in the crash, he said.
Jordan TV footage showed the bus' green and white frame twisted with part of the vehicle's body shorn off.
The bus began its journey earlier Saturday from the southern Red Sea port city of Aqaba and crashed midday, al-Khatib was quoted as saying.