After a dramatic chase which lasted for 45 minutes, they were recaptured.
Assistant Curator of the zoo, SS Ali Mashaddy, said the chimps managed to climb the wall of the enclosure using a water pipe.
"Our staff had overlooked the pipe. However, we could catch the chimps because of alert security guards and caretakers," he added.
Three chimpanzees -- Chiko (18 years), Chipa (20 years), Chikita (30 years) -- were gifted by Israel Nature and Parks Authority (INPA) whose delegation had visited the zoo earlier.