BUFFALO, NY-- The Erie County Health Department says they are investigating complaints about illnesses associated with several local Mighty Taco locations.

Public health sanitarians spent parts of Wednesday and Thursday morning looking into the affected locations.

The health department would not confirm which locations are being investigated, or how many people were affected.

However, in a statement Mighty Taco confirmed the complaints involved five people from four different locations. They say officials are testing an isolated batch of refried beans supplied by a third party vendor for a possible cause. They've removed that batch of refried beans from their restaurants.

Around 2:00 p.m. Thursday, a Niagara County spokesperson said their health department had received four complaints about Mighty Taco and is also investigating several Niagara County locations, too.

The Erie County Health Department says, in addition to Niagara County, the investigation is being conducted jointly with the New York State Department of Health and the New York State Department of Agriculture and Markets.

The ongoing investigation includes evaluating the nature of the reported illnesses as well as inspecting, sampling and analyzing food ingredients from both inside the restaurant and within their ingredient supply chain.

Russell Jasulevich, Mighty Taco Chief Operating Officer issued this statement Thursday afternoon:

For the past few days, Mighty Taco has been working both internally and with the Erie County Health Department to investigate illness concerns expressed by a small number of customers. Mighty Taco first became aware of the situation when five customers from only four store locations recently reported these concerns.

The focus has now turned to the New York State Department of Health testing an isolated batch of refried beans provided by a third-party supplier for any possible cause. There are no conclusive results at this time but, in an abundance of caution, Mighty Taco has voluntarily removed that sole suspect batch of refried beans from our stores and that batch is no longer available to customers.

Mighty Taco takes this very seriously and is committed to providing the best products as we daily serve thousands of meals for our customers throughout Western New York.