An investigation was underway Monday into an off-road vehicle rollover crash in the Santa Ana river bottom that left three people hospitalized.

The crash occurred at about 7:35 p.m. Sunday near Mission Inn Avenue on the border between Riverside and Jurupa Valley, according to the Riverside Fire Department. One person was critically injured and two others suffered moderate injuries, said Battalion Chief Bruce Vanderhorst.

The Riverside Police Department was investigating the crash.

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