An investigation has been launched into a significant pollution incident in waterways between Dromore and Omagh.
The Loughs Agency has confirmed that it has located the source after being notified of pollution on the Owenreagh River, near Dromore on Wednesday evening.
The Drumragh River has also been affected.
The Ulster Herald understands that the incident surrounds a significant amount of slurry flowing into the local waterways. Photos have appeared on social media showing effulent flowing through Omagh town centre.
The Loughs Agency said its staff investigating the incident worked throughout Wednesday night.
It confirmed that evidence of dead fish had been found. The agency said it had deployed aeration equipment to re-oxygenate the water in the local rivers.
“On Wednesday 23rd May, Loughs Agency received a call about a pollution incident on the Owenreagh River near Dromore, Co Tyrone. Agency staff located the source and are investigating the incident. Statutory samples have been taken and despatched for analysis.
“The investigation carried on during the night and the pollution has continued to move downstream into the Drumragh River. The Agency has unfortunately found evidence of dead fish. The Agency have deployed aeration equipment to re-oxygenate the water. NIEA has been advised of the incident and the investigation is ongoing.”