Arizona execution of Clarence Dixon on track after court challenges fail

Clarence Dixon is set to die at the hands of authorities in the US at 10am on Wednesday (Arizona Department of Corrections, Rehabilitation and Re-entry/AP)

The planned execution of an Arizona man remains on track after two last-minute court efforts ended without decisions that would sidetrack the state from putting 66-year-old Clarence Dixon to death.

Early on Monday, the state supreme court declined to overturn a lower court ruling that found Dixon is competent to be put to death.