BEIJING: Frustrated Chinese relatives of passengers onboard missing Flight MH370 on Wednesday visited the offices of Malaysia Airlines in Beijing to confront officials after regular briefings by the airline were halted. The relatives had previously been given regular updates on the search for the plane by airline officials at a hotel in Beijing. But the briefings were cancelled last month, to the fury of many who say they no longer have any way of making their voices heard. Relatives organized a visit to the Beijing office of the airline to “demand answers,” a message posted on their official online account said, but were turned away and refused access to airline staff. A heavy security presence blocked journalists from entering the building and reporters interviewing relatives outside were closely watched by police, as five marked police vans were parked nearby. “I came here today to get answers but I am not allowed to see anyone,” said Dai Shuqin, who added her younger sister was on the plane.