US Navy Admiral Frank Bradley will give a classified briefing to top congressional lawmakers on Thursday, after a recent controversial American double-strike on a boat that was allegedly transporting drugs in the Caribbean.
Defence Secretary Pete Hegseth and others in the Trump administration have come under scrutiny over the 2 September incident.
The revelation that there were two strikes has raised new questions over the legality of the administration's deadly ongoing campaign against boats, due to what the rules of conflict say about targeting wounded combatants.
The White House has said Adm Bradley was responsible for the move, and that he acted within the law.
Adm Bradley is expected to show video of the incident to members of Congress and explain his decisions, a source told the BBC's US partner, CBS News.
