Mainland netizens, angered by official denunciations of Saturday's massive riot in Guizhou province as the work of gangsters, have raised their voices over the incident, with some using creative new ways to circumvent official internet filters. Web users have vented their outrage over the official conclusion on major mainland news chat rooms and online forums. In addition to expressing condolences for the girl in Wengan county whose death triggered the riot, posters asked why people seeking the truth about her death had become gangsters in official eyes. 'Our daughter is raped, and you call us gangsters? We were arrested when we were enraged by the crime and asked the government to punish the criminals according to the law,' one writer said on a major mainland forum. 'We were confused and had no hope. Why detain us? The government told us the answer - that it was because we are gangsters.' County residents uploaded images of the riot, showing thousands taking to the streets over the police's conclusion that the girl had committed suicide. Her family insists the teenager was raped and killed. Internet users nationwide have responded, posting thousands of messages supporting the protesters and appealing for a further investigation into the girl's death. The probe was reopened yesterday. Several major chat rooms and forums deleted riot-related posts, especially those criticising the official reports and offering details and clues for further investigation. But some contributors found inventive ways around the automatic blocks. Many logged on to a website that arranged their sentences vertically rather than horizontally, allowing them to post analyses and opinions freely. Web surfers also avoided sensitive keywords in their post titles and adopted new terms to associate the posts with the issue. For example, instead of using 'Wengan' or 'Guizhou' in their posting, they referred to 'the home of the gangsters' or 'the province of the Maotai', a famous liquor. Some netizens even appealed to the public to launch an MSN signature campaign to support the protesters.