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6 June 2013, 17:50 | Updated: 6 June 2013, 17:54
Visitors to London Zoo are being warned not to try and stroke the monkeys after a safety report found 15 people have been bitten by them over the last year.
None of the bites from the squirrel monkeys were serious.
Pushchairs have already been banned from the walk-though enclosure to stop the monkeys hunting for food and staff are reminding people not to get too close.