PICTURES Storm Ali latest: M1 closed in both directions due to fallen cables
A post on PSNI Banbridge Facebook said: "This will cause significant disruption so please find an alternative route.
"Please share."
A PSNI spokesman added: "M1 Motorway is closed westbound from Black's Road Dunmurry and east bound from Saintfield Road due to fallen cables.
"Motorists should seek alternative routes.
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Hide Ad“Saintfield Road is also closed at the junction of the old Ballynahinch Road due to a fallen tree.
"Motorists are advised to exercise extreme caution in adverse weather conditions. Police are advising motorists to stay in their vehicles."