LA PAZ, Bolivia — Bolivian ex-president Evo Morales said on Sunday his vehicle was fired upon amid rising political tensions in the South American country between a faction around the iconic former leader and the government of his former ally, President Luis Arce.

Morales posted a video on Facebook taken inside a moving car, showing him sitting in the front passenger seat and at least two bullet holes in the windshield. The driver appeared to have been injured, though was still driving the…