Two Indian-flagged vessels carrying crude oil were attacked on Saturday while attempting to cross the Strait of Hormuz, India's Ministry of External Affairs confirmed in a statement.
India said it had called in the Iranian envoy to New Delhi and flagged its "deep concern" over the attack.
One of the vessels attacked was identified as the Sanmar Herald, an Indian government source said.
The crew on board and the vessel were safe, the source said.
India's top foreign ministry official asked the Iranian ambassador to convey India's view to Iranian authorities and to resume, at the earliest, the process of facilitating India-bound ships across the Strait, a statement from the ministry said.
The ambassador said he would convey these views to Iranian authorities, the statement said.
Putin says US-Russia contacts beneficial as talks begin with Witkoff and Kushner
Chinese national rescued from Nepal tunnel 10 days after flash flood
US envoys Witkoff, Kushner arrive in Moscow for talks on peace in Ukraine
One dead, 11 people missing after mudslide in China's Jiangxi province
Philippine VP Duterte posts bail after arrest order for alleged grave threats
Lindsay Clancy trial over killing her children ends in mistrial
Israel says it strikes southern Lebanon after Hezbollah drone launch
Sydney sweats in spring hot spell, faces 'extreme' bushfire risk
