A United Airlines plane that took off from San Francisco on Sunday was forced to turn around mid-way into its flight to Hawaii due to a mechanical issue, a report said.

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The passengers “deplaned normally” at the airport and will be compensated and put on another flight, the airline told SFGate.com.

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The cause of the mechanical issue on Flight 694 was not immediately known, but it was due to land at Kona International Airport at 2 p.m. Instead, the Boeing 737-900 arrived at San Francisco International three hours after departing.