A bus accident has injured 21 workers at South Pars Phase 12, and three are in critical condition.

According to Iran's Labour News Agency (ILNA), on Tuesday at 7 PM, the workers' shuttle bus fell into a canal near the refinery.

Eyewitnesses commented that the exceeding age of the retired bus was one of the most important factors in the accident.

Labour sources in the region report that many of the worker transport vehicles used at the South Pars Project are in similar condition.