Two buildings of the largest illegal building clusters in Zhengzhou were demolished on Monday, February 25, 2008. [Photo: Dahe Daily]

Two buildings in Dihu Garden, the largest illegal building clusters in Zhengzhou of central China's Henan Province, were demolished on Monday.

Local newspaper Dahe Daily reported that the illegal building clusters obstructed the watercourse of the nearby Jinshui River and influenced flood release of the city.

Both buildings with serious harm to public security were blown up before completion. Measures were taken to ensure the security of the surroundings.

Other illegal facts of the building clusters include building without permission, changing usages of land without notice and lack of construction quality supervision.

The Jinhai Reservoir on Jinshui River near the building clusters was built in 1958 and is an important safeguard of the city's flood release system.