NEW DELHI, June 11 (Xinhua) -- Three Indian seafarers who had been reported missing after a U.S. attack on a commercial vessel off the coast of Oman have been confirmed dead, India's federal Minister for Ports, Shipping and Waterways Sarbananda Sonowal said Thursday.

According to India's foreign ministry, there were 24 Indian crew members onboard the vessel when it came under attack on Wednesday.

India on Wednesday condemned the attack and stated that the attacks on shipping in the region are "deeply worrisome" and termed them a direct result of the ongoing conflict in the Middle East.

The foreign ministry called for "immediate de-escalation of tensions" and an end to "the targeting of commercial shipping and civilian infrastructure in the region" in a statement.

Reports said India issued a demarche to the U.S. top diplomat in New Delhi.