The tanker MT Riah was detained along with 12 Indian crew members by the Iranian Coast Guard on July 13. Nine crew members have been released and "they will be on their way to India soon", Ministry of External Affairs spokesperson Raveesh Kumar said.
"Our mission in Iran has requested the concerned Iranian authorities for the release of remaining crew members," he said.
Besides the three on board MT Riah, 18 Indians are still on board the British oil tanker Stena Impero which was seized last week by the Iranian Revolutionary Guards in the Strait of Hormuz.
There are also 24 Indian crew members on board Iranian tanker 'Grace 1', which was detained by British marines in the Strait of Gibraltar.
On Thursday, the Indian embassy in Tehran got consular access to the 18 Indians on board Stena Impero.
India is in touch with the Iranian authorities over these 18 Indians. "We continue to impress upon the Iranians to release them so that we can repatriate them," Kumar said.
Minister of State for External Affairs V. Muraleedharan also tweeted that the embassy in Tehran has got consular access to the Indians on board Stena Impero.
"All of them are fine, the minister said, adding India will continue to push for their early release," he wrote.
A three-member team from the Indian High Commission in London met the 24 Indian crew members on board 'Grace 1' on July 24 and told them the government will take the necessary steps for their release and repatriation, the spokesperson said.
The 24 Indians were "calm and composed and there was no sense of panic. They are in touch with their family members", he added.
Muraleedharan tweeted: "Crew's morale is high. Assured all assistance for early release. HCI London will facilitate necessary travel document and related arrangements."
Ministry of External Affairs spokesperson Raveesh Kumar said: "We are pursuing the matter very closely with the Gibraltar port authorities and the shipping company."
He said the Indian crew were calm and composed and were in touch with their family members.
A three-member team from the Indian High Commission met the 24 Indians on board Grace 1 on July 24 and told them the government will take the necessary steps for their release and repatriation.
The Iranian super tanker Grace 1, said to be carrying 2.1 million barrels of light crude oil, was seized on July 4 in the Strait of Gibraltar as it was suspected of carrying oil to war-torn Syria in violation of EU sanctions.
On July 19, Gibraltar's Supreme Court extended the period of detention of Grace 1, and set a new hearing for August 15, the government of the British Overseas Territory said in a statement.
On the 18 Indians on board British-flagged Stena Impero that was detained by Iran in retaliation, he said that an Indian team had met the Indian crew members on July 25, and found them to be in good health. "They have sufficient store of food and medicines, and they have spoken with their families. We are in close touch with Tehran, and are trying to see how early we can secure their release."