LONDON (AP) — The British government aims to keep security costs for the 2012 London Olympics from spiraling beyond the $862 million budget.

Home Secretary Jacqui Smith said Thursday the government would not confirm details of the security project other than there were no plans to use the $342 million in contingency funds.

Smith said security details would remain confidential because they were still being developed and any announcement could allow potential terrorists to exploit them.

London's Metropolitan Police set up a team to protect the Olympic Park and businesses after a 2006 local government report said poor communication hampered the response to the suicide attacks that killed 52 people on London's transport system on July 7, 2005.

"The strategy and the concept of operations are designed to respond flexibly to changes in the risks to the games and deal with any unexpected events which may occur between now and 2012," Smith said.