Chinese officials announced on 24 July 2008 that they have disabled a terrorist cell that was planning to attack football venues in Shanghai. Authorities have increased security in Beijing, the capital, over the past year in the lead-up to the Olympic Games, which begin on 8 August. As a result, officials stated that they obtained information which indicated terrorist organizations would be launching an attack against the Olympic venue in Shanghai. Officials raided a number of facilities; however, they have not indicated where or when the raids took place, or how many suspects they detained. In an effort to increase security in Shanghai, more than 1,500 surveillance cameras have been installed on public buses throughout the city, especially those that pass by the stadium. Additional security checkpoints have been set up in and around all underground rail stations as well.