The Iranian warship Iris Dena was given permission by India to dock three days before it was torpedoed by a US submarine, India has said.
Foreign Minister S Jaishankar said Iran had sought permission for three of its ships to dock at Indian ports on 28 February - the day the US and Israel began a war on Iran - and permission was granted by India on 1 March.
The ships' movements between 1 and 4 March are not clear and nor is why only one of them made it to India.
The sinking of the Iris Dena, with 130 sailors on board, in international waters off Sri Lanka's southern coast on 4 March marked a dramatic widening of the war - and raised questions about India's authority in its backyard.
It was the first military strike outside the Middle East since the US and Israel launched their war on Iran. President Donald Trump has said destroying Iran's navy is one aim of the assault.
