A campaign demanding a crackdown on crime in Macau has persuaded many formerly silent residents to speak out. Eighty-nine letters were presented to participants during a five-hour sit-in staged by legislator Ng Kuok-cheong and Urban Councillor Au Kam-san, who deplored 'government incompetence'. 'People in Macau have been afraid to speak out . . . the problem of violence is at our door, you can't just keep silent,' Mr Ng said. The letters, written by Chinese and Portuguese residents, included calls to reshuffle senior management of the security authorities and tighten enforcement laws. Some also sought the strengthening of education. Mr Ng claimed a shortage of primary school places between 1989 and 1993 had created many youth problems. The outspoken legislator, who has been calling for a police anti-triad unit to be set up, said the campaign would continue to seek the support of local groups. Mr Ng said copies of the letters would be sent to Governor Vasco Rocha Vieira, who on Sunday called for international co-operation to combat rising organised crime. There have been eight murders - including those of three civil servants - and a wave of petrol bomb attacks on vehicles, with more than 50 set ablaze so far this year.