Afghan forces backed by NATO-led troops have killed 21 insurgents and arrested 11 others over the past 24 hours, a press release of Interior Ministry said Saturday. "Afghan police in coordination with army and NATO-led troops have killed 21 rebels and captured 11 others during series of operations across the country over the past 24 hours," the press release emphasized. Seven more insurgents have been injured during the operations, it further said. However, it did not say if there were any casualties on security forces over the mentioned period.