UTV report Judith Hill has just tweeted this image of Strangford Lough, adding that several ambulances have just left the scene.
A group of ambulances has just taken off with some casualties - rescue helicopter in the sky above lough http://t.co/zMKexpD3jU
The South Eastern Health and Social Care Trust in Northern Ireland said that casualties were being brought to the Ulster Hospital (Dundonald).
More top news
Australian businessman named as Alan Sugar's newest apprentice and winner of a £250,000 investment in his fledgling company.
The 270 victims of the Lockerbie bombing have been remembered today, 26 years to the day that they lost their lives in the air disaster.
Actress Billie Whitelaw, who starred in films including The Omen, has died aged 82.