Those numbers are in addition to the 12,000 police officers that will also be on duty on the busiest days of the games.
The government said the additional money was needed to make venues and other sensitive sites, such as hotels, more secure. The total cost of securing the venues has climbed to more than 553 million pounds ($862 million).
Although Britain's Home Office initially budgeted 600 million pounds ($940 million) for that, that number has been trimmed to 475 million pounds ($745 million).
Associated Press Writer Paul Logothetis contributed to this story.
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