Shehehabi shot video that she said showed teargas and shotgun pellets being used on the demonstrators.

CNN: Funeral in Bahrain erupts in violence

Last month, police in southern Tanzania used teargas to disperse about 200 Christian rioters attempting to torch a mosque over an animal slaughtering conflict.

BBC: Tanzania church hit by deadly explosion

The police had to escort the team out of the stadium and were forced to fire teargas to disperse fans who invaded the pitch.

BBC: By Emmanuel Muga

Last month, police in southern Tanzania used teargas to disperse about 200 Christian rioters attempting to set fire to a mosque following a dispute over animal slaughtering.

BBC: Tanzania church attack: Saudis held for 'act of terror'

Questions asked by the BBC about what research, if any, has been conducted at Salmaniya on the effects of teargas on SCD sufferers have not been answered by the hospital.

BBC: Bahrain sickle cell death rise causes concern

Police fired teargas at around 500 people protesting against the arrests outside police headquarters in Blantyre, while another group, estimated to be in the thousands, blocked the main highway to the capital, Lilongwe, with boulders and branches, AFP news agency reports.

BBC: Malawi arrests over 'anti-Joyce Banda coup plot'