Waterways Ireland has issued a warning to advise masters of vessels and all other users of the need to take extreme care if visiting the inland waterways navigations during the present cold weather.

Snow bound harbours and ice covered jetties in particular are dangerous to walk on or near because of the risk of slipping, tripping or falling near to the water's edge.

Sections of the Royal and Grand Canals and the Shannon Erne Waterway have restricted navigation due to ice accumulation.

Where water in lock chambers has frozen the public is warned not to attempt to cross over a lock in this state due to the great danger of ice cracking underfoot and being drowned in the lock.