Britain's defense secretary has confirmed the six sites that will host surface-to-air missiles as part of security measures to protect the Summer Games.

Philip Hammond told lawmakers Tuesday the weapons will be located across the capital, including on the rooftops of two east London apartment blocks.

Residents at the Lexington Building and the 17-story Fred Wigg Tower, both in East London, have expressed concern at hosting the missiles. Defense officials say those buildings offer the best vantage points across London's Olympic Park.

Missiles will also be stationed at a reservoir and farmland in east London and along hillsides in south London.

Some residents are continuing legal challenges, seeking to block the military's plans. Hammond says he is confident of defeating their objections in court.