WELLINGTON: New Zealand police said four officers were shot Wednesday during a siege at a rural property that began when an offender started taking potshots at an aircraft being used in an anti-drug operation. One officer was serious but stable and the injuries sustained by the other three were not life threatening, Deputy Commissioner Mike Clement said. He said the siege, which was still ongoing at 6:00 pm (0500 GMT), began after a police plane searching for cannabis came under fire near the North Island town of Kawerau.