(COMBO) This combination of frame grabs pictures from a video released by the US Department of Defense on March 4, 2026, shows what the Department of Defense says is periscope footage of a US Navy submarine firing on and sinking an Iranian warship in the Indian Ocean. A US submarine torpedoed and sank an Iranian warship in the Indian Ocean, Defense Secretary Pete Hegseth said Wednesday. Nearly 150 were missing and several dead after the frigate IRIS Dena sank Wednesday off Sri Lanka, officials said. - RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / US DEPARTMENT OF DEFENSE / HANDOUT" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS (Photo by US DEPARTMENT OF DEFENSE / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / US DEPARTMENT OF DEFENSE / HANDOUT" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS