A man tried to set himself on fire outside Belfast City Hall on Wednesday evening, graphic video footage shows.
Click here to see what happened. (Warning: graphic content and language)
The man, who police confirmed to be aged in his 30s, was seen setting a piece of cloth alight on the ground near a bench in the centre of the city.
Just seconds later he is seen dousing himself in some kind of liquid as those videoing the events shout at him to stop and get away from the fire.
He is then prevented from returning to the flames by a passer-by before others join in in forcing him to the ground.
Police confirmed a man was detained under the Mental Health Act after they received a report of a man in distress in Donegall Square North at around 6.15pm.
Both police and the Ambulance service attended the scene.