PAGE, AZ - A northern Arizona roadway is closed after the pavement collapsed Wednesday.
The Arizona Department of Transportation says a 150-foot section of US 89 buckled this morning about 25 miles south of Page.
Officials initially said the cause was not weather related and may be a "geologic event."
But after investigation by geotechnical engineers, it was determined the collapse was due to a landslide.
US 89 is closed northbound at US 89A and in Page US 89 is closed at the junction with State Route 98.
Drivers trying to get to Page are advised to take the alternate route that will put them about 45 miles out of their way.
That route will take them east on US 160 to SR 98 and north on SR 98 to Page.
Photos show the road cracked, buckled and dropped below pavement level.
ADOT said it doesn't know how long the road will be closed.
For the latest highway conditions check ADOT's travel information site at www.az511.gov .