DUJIANGYAN, China - Chinese police dragged away more than 100 parents Tuesday while they were protesting the deaths of their children in poorly constructed schools that collapsed in last month's earthquake.

The parents, many holding pictures of their dead children, were pulled down the street away from a courthouse in Dujiangyan, a resort city northwest of the Sichuan provincial capital of Chengdu.

"Why?" some of them yelled. "Tell us something," they said as black-suited police wearing riot helmets yanked at them.

The parents had been kneeling in front of the courthouse yelling, "We want to sue." Their children attended a high school in Juyuan, near Dujiangyan, where 270 students died.

The Southern Metropolis News quoted a rescuer as saying that rubble from the school showed that no steel reinforcing bars had been used in construction, only iron wire.

The government says the May 12 earthquake destroyed 7,000 classrooms. Many parents have accused contractors of cutting corners when building the classrooms, resulting in schools that could not withstand the 7.9-magnitude quake. Pictures of collapsed schools surrounded by buildings still standing have fueled anger.

Police dragged an Associated Press reporter and two photographers who were covering the protest up the steps into the courthouse, trying to prevent them from seeing the demonstration.

Calls to local police were not answered Tuesday.

Asked why reporters were removed from the courthouse, an official from the foreign affairs office of the local government, Zao Ming, said "this is not a good place to do interviews. ... In a disaster like this, there will be a lot of opinions. The government will solve their problems."

There were also several Japanese reporters at the courthouse. One witness who did not want to be identified said police told the parents: "The Japanese are reporting bad things about you."

Foreign Ministry spokesman Qin Gang said Tuesday that the government had been unusually open about allowing journalists to report on the earthquake and its aftermath. He told a news conference in Beijing that the "principle of transparency and openness remains unchanged."

He said local authorities were making decisions based on the conditions in the disaster zone, though "they are not trying to block any news or to make difficulties for the reporters."

The protest happened while Chinese leader Li Changchun, the country's fifth-ranked ruler, was touring other parts of the city. The official Xinhua News Agency said Li was checking heritage sites damaged in the earthquake.

The confirmed death toll for China's worst disaster in three decades was raised Tuesday to 69,107, an increase of about 90 people from a day earlier, and 18,230 people are still missing, the State Council said. The quake also left 5 million people homeless.

Meanwhile, the official Xinhua News Agency said that authorities have delayed for two days an attempt to divert water from a huge lake formed when the quake sent landslides tumbling into a river in Beichuan in northern Sichuan.

Water levels in the lake had been rising steadily and threatened to flood surrounding areas, prompting authorities to evacuate nearly 200,000 people already uprooted by the quake.

But Xinhua said with little rain forecast for the next several days, rescue workers were not likely to start draining off the water until Thursday. The work had been expected to begin Tuesday.

Workers have already used heavy equipment to dig a runoff channel to remove the water. The government is worried the newly formed lake could burst, sending a wall of water through a valley.

In an indication of how difficult rescue conditions are in parts of Sichuan, there was still no sign of a helicopter that crashed more than three days ago while ferrying survivors. Thousands of soldiers have been combing remote mountains in search of the military helicopter.

The Russian-designed Mi-171 transport was carrying 19 people, 14 of them people injured in the quake, when it flew into fog and turbulence and crashed Saturday near the epicenter of the quake in the town of Wenchuan, state media reported.