A firefighting helicopter has crashed into the sea near Korea's easternmost island of Dokdo less than three minutes after taking off, leaving several people missing.<br />According to the National Fire Agency,… an emergency helicopter, which was carrying seven people including a patient,… crashed on Thursday night at around 11:30PM, Korea time.<br />Authorities immediately dispatched naval patrol boats and aircraft to the site for a search and rescue mission.<br />Prime Minister Lee Nak-yeon also ordered full efforts to find survivors.<br />Winds around Dokdo were thought to have been blowing at around 10-to-12-meter a second at the time of the accident.<br />