The helicopter carrying Iran's President Ebrahim Raisi takes off at the Iranian border with Azerbaijan after the inauguration of the dam of Qiz Qalasi, in Aras. [AFP]

Iran's state television said Monday there was "no sign" of life among passengers of the helicopter which was carrying President Ebrahim Raisi and other officials.

"Upon finding the helicopter, there was no sign of the helicopter passengers being alive as of yet," state TV reported.