South Korean tech giant Samsung Electronics said Tuesday that its co-chief executive officer Han Jong-hee has died due to cardiac arrest. Han was 63. Han was in charge of Samsung's consumer electronics and mobile devices division,

Samsung Electronics said on Tuesday that co-CEO Han Jong-hee had died of a heart attack, leaving newly-appointed boss Jun Young-hyun solely in charge of the tech giant as it revamps its underperforming chip business and navigates trade uncertainties.

Jong-hee Han had led the South Korean firm’s smartphone and consumer electronics division. No immediate successor has been named.