The crash took place at 1 a.m. Saturday on a mountainous, zig-zag stretch of highway.
The accident began when a delivery van traveling downhill during a downpour slammed into a Superlines bus.
The bus and van both spun out of control and hit other vehicles in the opposite lane, Gulf News reported.
As a result, a cargo trailer, a jeep, two other trucks and a passenger bus were also involved in the accident.
Some of the victims were ejected from the bus, Gulf News said, and one of the victims was a 1-year-old child.
Police said they have detained the driver of the delivery van, Albert Talento-Nava, 48, while they complete an investigation.
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