Families of Chinese passengers on board missing Malaysia Airlines Flight 370 have engaged in a rare late-night act of civil disobedience in this tightly-controlled city. After unsuccessfully demanding a meeting with the Malaysian ambassador at their hotel for more than eight hours, angry relatives pushed past police officers who tried to stop them from making a midnight march across the Chinese capital. Their destination: the Malaysian Embassy. The ambassador kept saying he would come but he never showed, an elderly man told CNN as he and scores of others walked quietly through Beijing's streets. As has been the practice of many other Chinese passengersnext of kin, the man asked not to publish his name. They 're lying. They 're lying to us, the man repeated. And now we 're going to the embassy. If they wo n't come to us, we 'll go to them. The surreal late-night procession was followed closely by police squad cars. Around midnight, more than one hundred relatives staged a pre-dawn sit-in outside the embassy gates. Though vastly out-numbered by Chinese security forces, the family members continued their stubborn vigil throughout the morning. They remained camped out by the diplomatic mission more than 15 hours later. Periodically, they chanted Fulfill your commitments ! No more delays ! No more lies ! Throughout the sit-in, no Malaysian diplomat came out to meet with