Videos and photographs from the scene show pandemonium and panic breaking out among the crowd as they try to escape the noxious fumes
IHRC is deeply concerned about reports of an armed police build up outside the city of Kano.
Scores of people were killed and many injured after Nigerian security forces attacked them
Final death toll could reach 100
The Nigerian state has launched a bloody crackdown on the IMN. Warning: Graphic images attached
Suspected plans include attacking processions, burning homes and business premises of the participants while they are away, and hiring thugs to assault mourners