Commander-in-Chief of the Iranian Army Amir Hatami has warned that the killing of 104 crew members from the IRIS Dena in the Indian Ocean “will not go unanswered”, reports Al Jazeera.

“The crew of the Dena destroyer had completed a peaceful mission and were targeted while on their way back to Iran,” he was quoted as saying by Iran’s IRNA news agency, adding that the sailors were attacked despite not being engaged in a direct battle.