Tehran has vowed a "far more severe" response beyond the region after overnight US strikes on missile sites and boats planting mines in southern Iran, even as both sides say negotiations toward a Hormuz deal are still on.

The US targeted Iranian missile sites and mine-laying boats near Hormuz, citing self-defense, as Tehran engaged in peace talks to resolve the ongoing three-month conflict.

Tehran has vowed a "far more severe" response beyond the region after overnight US strikes on missile sites and boats planting mines in southern Iran, even as both sides say…