Protesters are blocking a Pacific National Freight Train that they believe could be transporting cyanide through the Richmond Valley in northern NSW today.

Nimbin based cyanide watch activist Graham Dunstan says the protest aims to bring attention to the dangers of transporting cyanide, which is used in the gold mining industry.

Mr. Dunstan says distress flares will be used to try to stop the train at Kyogle.

I'm crossing live to Chibo who is at the scene..

Hear Chibo's Report.