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,

Han, who was credited with elevating the company’s television business, died at a hospital after being treated for a heart attack.

Crown Castle shares fell in intraday trading Tuesday after the provider of towers and other communications infrastructure announced it was firing Steven Moskowitz as its CEO after less than a year at the helm.

Crown Castle fired its chief executive after agreeing to sell parts of its business to focus on its core towers segment. The telecommunications company said Monday that it had terminated Chief Executive Steven Moskowitz.