An explosion aboard the Iranian naval frigate IRIS Dena has resulted in significant casualties, with at least 87 sailors confirmed dead and 78 wounded, according to initial reports.

The incident occurred approximately 25 miles south of an Indian Ocean island. The IRIS Dena, which carries a crew of 180, was reportedly damaged in what has been described as an explosion.

The nature and cause of the explosion remain unclear from available information. Iranian naval authorities have not yet released official statements regarding the incident or provided details about rescue operations.

The casualty figures represent a substantial portion of the vessel's total crew complement. The extent of damage to the frigate itself has not been confirmed.

This represents one of the most serious naval incidents involving Iranian forces in recent years, though official confirmation and additional details from Iranian authorities are still pending.