The city proper itself was only lightly damaged by the earthquake of 12 May 2008. However, Beichuan County, which is in the prefecture, is among the most severely hit of all disaster regions following the earthquake, including the Beichuan High School campus where more than 1,000 students lost their lives after two main buildings collapsed. Around 80% of the county's buildings are said to have collapsed, including its main government building. The casualty toll for the quake in Mianyang Prefecture as of 7 June 2008 was 21,963 people killed, 167,742 injured, and 8,744 people missing.