The attacks resulted in the paralysis of Yugoslav civilian and military command and control, the widespread destruction of Belgrade's infrastructure, and many civilian casualties. The ground invasion had begun a few hours earlier, and air attacks were also made on VVKJ airfields and other strategic targets across Yugoslavia. Among the non-military targets struck during the bombing were the National Library of Serbia, which burned to the ground with the loss of hundreds of thousands of books and manuscripts, and the Belgrade Zoo.