Visitors to a Tyneside food festival at the center of a food poisoning probe are being urged to take part in an online survey to identify the source.

BBC News reports more than 380 visitors to the three-day Street Spice event reported symptoms including diarrhea and abdominal pain.

Salmonella has now been found in 14 samples submitted for testing.

The Health Protection Agency (HPA) is urging all visitors to fill in the survey to say where they ate so the source can be traced.

A spokesman for the HPA said, “A total of three vendors are highlighted in this questionnaire.

“We would not expect illness to be associated with all vendors but it is important to ascertain as much information as we can about each of them.”

An estimated 12,000 people attended the event, which took place in Times Square between 28 February and 2 March.