Pocatello, Idaho Health officials in southeastern Idaho say they have been unable to pinpoint the source of a salmonella outbreak last month in Blackfoot.

Laboratory tests indicated the six people who tested positive for salmonella poisoning over a two-week period in early May were infected with the same common strain of the bacteria.

The source has not yet been identified, but Maggie Mann, health promotion director for the Southeastern District Health Department, says the illnesses seem to have stopped.