Iran said on Tuesday it had arrested people accused of a role in
shooting down a Ukrainian airliner and had also detained 30 people involved in
protests that have swept the nation for four days since the military belatedly admitted its error.
![Iran makes arrests in plane shootdown, police crack down on protests](https://media.zenfs.com/en-US/reuters.com/308911b8a825e73dd0d5fd696bc2cf96)
Wednesday's downing of
Ukraine International Airlines flight 752, which killed all 176 people aboard, has created a new crisis for the Islamic Republic's clerical rulers.
President Hassan Rouhani promised a thorough investigation into the "unforgivable error" in an address on Tuesday.