Marjorie Wallace, chief executive of the mental health charity Sane, said every violent incident involving a mentally ill person would inevitably call into question the policy of care in the community.

BBC: NEWS | Health | Most mentally ill pose no threat

British Prime Minister Tony Blair says Britain bears "no ill will" toward the Iranian people over the incident.

NPR: Standoff Over, What's Next for Iran and the West?

Officers said his death could have been linked to another incident which left a Bangor man "extremely ill".

BBC: Ecstasy 'pink love' poison warning from police and doctors

North Wales Police say his death could be linked to another incident which left a Bangor man "extremely ill".

BBC: North West Wales

Four people had to be treated at London Bridge Station after being taken ill in what was initially feared to be a chemical incident.

BBC: London Bridge station chemical fear after four fall ill

The incident involving the two boys apparently passed without ill effect but under different circumstances, as Professor Boissevain pointed out, "such deeply embedded prejudices that surface unexpectedly in moments of anger, can spark off crises".

UNESCO: WHO IS THE OTHER?

"We have never, to our knowledge, had an incident at our show where a dog has become ill or was harmed as a result of being poisoned, " the kennel club said in a statement.

WSJ: Owner: Dog may have been poisoned at Westminster

On Monday around 60 school girls were taken ill with similar symptoms in a neighbouring province, Parwan, the scene of another such incident in April.

BBC: Pupils boycott Afghanistan school