The local fire brigade and paramedic were called to the 2 Sisters factory in Anglesey on Monday. The emergency services were following reports in the morning of an ammonia leak at the site. Four people have been taken to hospital after the leak.

       It has also been reported that many others are being treated at the location of the factory, which is in Llangefni.

       If a person is exposed to high concentrations of ammonia gas it can cause immediate burning of the eyes, nose, throat and respiratory tract.

       It can also result in blindness, lung damage or death in high concentration exposure.

       More to follow...