Iran will punish all those responsible for the accidental shooting down of a Ukrainian passenger plane, President Hassan Rouhani said in a televised speech on Tuesday, adding that the ā€œtragic eventā€ would be investigated thoroughly.

ā€œIt was an unforgivable error … one person cannot be solely responsible for the plane crash,ā€ he said.

ā€œIranian armed forces admitting their mistake is a good first step … We should assure people that it will not happen again,ā€ he said, adding that his government was ā€œaccountable to Iranian and other nations who lost lives in the plane crashā€.

(Writing by Parisa Hafezi; Editing by Edmund Blair)