Two tigers escaped from a big cat shelter near a small Dutch village on Saturday and remained free after a tranquiliser dart fired by police failed to take effect. The two – Bengal tigers named Radjah and Dehli – remained on the shelter’s land, although the fences were reported to be too weak to contain them. “We are now going to try to bring them back to the shelter.” They later said one of the two had been shot with a tranquiliser dart, but that it had not taken effect.