Police have taped off the entrance to the McDonald Inchyra Hotel and Spa in Grangemouth as the hotel is understood to have been evacuated.The exact nature of the incident is not yet known but unconfirmed reports suggest there has been a significant chemical leak at the hotel's swimming pool.Three fire engines, a support unit and an ambulance Specialist Operations Response Team are also on the scene.It is understood the smell of chemicals quickly spread through the hotel's air conditioning unit