More Walkerton deaths linked to E. coli

The E. coli outbreak in Walkerton, Ont. is being blamed for killing even more people.

The chief coroner's office in Ontario has added another three deaths to the list of those suspected of being killed by E. coli bacteria contaminating the town's water system in May.

All three of the new victims were elderly women in their 80s.

In all, 21 deaths are being investigated. Seven are confirmed to have been caused by E. coli infection. Two thousand other people got sick from drinking the contaminated water.

An independent provincial inquiry will examine what happened to Walkerton's water and look at how to ensure the safety of drinking water in Ontario. It's expected to begin this fall.