The death toll from a powerful explosion at Iran's biggest port has risen to at least 40, with more than 1,200 people injured, state media reported on Sunday.

The death toll from a huge explosion that rocked one of Iran’s main ports rose Monday to 46 people killed, authorities said. Iranian state television offered the toll from the blast at Shahid Rajaei port near Bandar Abbas,

The explosion occurred as Iran began a third round of nuclear talks with the United States, but there was no immediate indication of a link between the two events.