Photo taken on Feb. 1, 2017 shows a helicopter searching for missing people in a boat accident in waters off the Malaysian state of Sabah. The search and rescue operation expanded to 3,900 square nautical miles on Wednesday, up from Tuesday's 3,000 square nautical miles, involving 350 personnel and 22 assets from the Malaysian navy, maritime authorities and the police as well neighboring Brunei. (Xinhua)