New Delhi/IBNS, April 18 -- India has summoned Iran's Ambassador, Mohammad Fathali, to formally protest after an Indian-flagged vessel came under fire in the Strait of Hormuz on Saturday.

The move signals a sharp escalation in diplomatic engagement as tensions intensify in the strategically vital maritime corridor.

According to government sources, New Delhi plans to convey its "serious concerns and displeasure" over the incident.

Officials have questioned the circumstances under which Iranian forces opened fire on civilian shipping in one of the world's busiest sea routes.

The Ministry of External Affairs called in the Iranian envoy following reports that Indian vessels were targeted while transiting the narrow waterway.

Authorities ...