Police in Belfast are attending the scene of a security alert after an explosion was reported in the north of the city last night.
No-one was injured in the incident which police say happened in close proximity to a number of PSNI officers near a section of the M5 motorway at 9.15pm.
The slip road at Greencastle northbound has been re-opened following a police investigation but the section between Hazelbank and Greencastle remains sealed-off.
Motorists are advised to seek alternative routes as police have warned that the section of motorway will be closed for some considerable time.
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Further searches are being carried out in the area to establish what caused the suspected explosion.
No further details of the incident have been released.