Police made the announcement in a tweet Tuesday morning. They said the crash occurred on the Ibri-Fahud Road, without elaborating. Fahud and Ibri are cities west of the capital, Muscat, though it wasn't clear whether police meant the road linking the two cities.
A telephone number for an Oman police spokesman rang unanswered Tuesday.
There was no information about the crash on the state-run Oman News Agency, nor on the country's state broadcaster.
Oman is a country on the far east of the Arabian Peninsula whose neighbors include Saudi Arabia, the United Arab Emirates and Yemen.
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