The US Navy has dismissed a ship commander who had raised the alarm about a coronavirus-stricken ship.

Navy Secretary Thomas Modly announced Thursday that Capt. Brett Crozier's was relieved of his duty on the USS Theodore Roosevelt, which had at least 114 confirmed cases of COVID-19. According to a leaked letter obtained by the San Francisco Chronicle, Crozier had urged Navy leadership to take "immediate and decisive" to protect 4,800 service members who are aboard the ship.