Bus crash in northern Chile kills at least 20
Castro says it's not yet clear what caused the accident
Authorities say a bus has fallen down a ravine in northern Chile, killing at least 20 people.
The bus ran off a winding road Sunday night in the Taltal region and rescuers were still trying to retrieve victims on Monday. Official investigator Ricardo Castro says 21 people are injured.
The bus fell about 20 to 30 meters (65 to 100 feet).
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Castro says it's not yet clear what caused the accident.
