The death toll from a powerful explosion at Iran's biggest port of Bandar Abbas has risen to at least 40, with more than 1,200 people injured, state media reported on Sunday, as firefighters worked to fully extinguish the fire.

Iranian authorities have yet to confirm what caused a massive port explosion that killed at least 40 people on Saturday. The blast hit the container terminal at Shahid Rajaee in Bandar Abbas at 09:00 UTC.