Parents of children killed when a school collapsed in the May 12 earthquake protested outside a court in Dujiangyan yesterday, as dissatisfaction with the way the government has handled the situation grows. More than 100 parents of students from a high school in Juyuan, a town administered by Dujiangyan, held up photos of their dead children, a participant said. No arrests were made, although police removed some, apparently because journalists were watching. Parents from other areas in the quake-hit region have held protests and memorial ceremonies, but this was the first by these parents. The protest occurred as Li Changchun , a member of the powerful Politburo Standing Committee, visited Dujiangyan yesterday. Mr Li inspected dams and cultural relics damaged in the quake. The parents had hoped to file a lawsuit at the court yesterday, but they claimed the government had pressured their lawyer into staying away. 'Our aim is to use the law,' said the father of one of the children killed in the quake. An estimated 260 to 270 students and six teachers died when the school collapsed. Witnesses say three buildings - the oldest dating back to 1988 and a newer wing to 1995 - crumbled when the quake struck. 'It is 'tofu' construction,' the mother of another dead student said, referring to the building's poor quality. 'It's the fault of the local officials.' Some parents had earlier called for a softer approach, ruling out collective action, but dissatisfaction has been mounting. Not all the parents were involved in the protest yesterday, but most hope to take part in some type of lawsuit. The parents are demanding an investigation and punishment for those found responsible, but talks with local education officials have failed to yield satisfactory results. 'They haven't given us their judgment,' said another mother, whose 15-year-old daughter died. The government has vowed to investigate the collapse of thousands of classrooms in the quake zone and punish those responsible. At the site of the former Juyuan school on Sunday, authorities had cordoned off the area, but locals and curious visitors continued to gather. Soldiers sprayed disinfectant on the site and workers started clearing rubble. Parents of children from other schools that collapsed have also turned activist. To mark Children's Day on Sunday, students of the Xinjian Elementary School in Dujiangyan held a memorial service and gathered on Monday evening under the watchful eyes of the police, an organiser said. Among the most vocal parents have been those of students attending a school in Wufu, near Mianzhu city , who have hung banners and staged protests.