A Sabreliner 60, registration XB-JMR, departed Guadalajara, Mexico, on a domestic flight plan to Quer‚taro, with two pilots. The aircraft lost altitude and disappeared off Mexican radar approximately 18:14 local time. The crew reported to Air Traffic Control at 10,000 feet, 14 miles south of Jamaica, and requested an emergency landing. The aircraft then circled the Portland Cottage area in Clarendon, squawking the Transponder code A1327, climbing out of 17,000 feet at 18:20 local. Search and Rescue was initiated by the Jamaica Defence Force at 18:22. The aircraft disappeared from radar at 18:34, with the transponder potentially being turned off due to crew action. The aircraft impacted the shoreline southeast of the White Sand Beach area of Rocky Point in Clarendon. Suspicion of drug transport was noted.A Sabreliner 60, registration XB-JMR, departed Guadalajara, Mexico, on a domestic flight plan to Quer‚taro, with two pilots. The aircraft lost altitude and disappeared off Mexican radar approximately 18:14 local time. The crew reported to Air Traffic Control at 10,000 feet, 14 miles south of Jamaica, and requested an emergency landing. The aircraft then circled the Portland Cottage area in Clarendon, squawking the Transponder code A1327, climbing out of 17,000 feet at 18:20 local. Search and Rescue was initiated by the Jamaica Defence Force at 18:22. The aircraft disappeared from radar at 18:34, with the transponder potentially being turned off due to crew action. The aircraft impacted the shoreline southeast of the White Sand Beach area of Rocky Point in Clarendon. Suspicion of drug transport was noted.