Topeka's third-party payment vendor was breached for just over one month possibly exposing the personal information of about 10,000 residents.

Topeka officials learned on December 7 when vendor Central Square, which handles the city’s billing payment system, informed the city of the incident, officials said in a statement. About 10,000 people may have been affected and Central Square has turned over its data to Topeka which has called in forensic experts to investigate the matter.

At this point it is not clear if the information was compromised, but the city is erring on the side of caution and informing those possibly affected.

“The data breach occurred between October 31 and December 7. The data breach would affect any City of Topeka utilities customer who made a one-time payment or set up autopay during this time,” the city wrote.

Those who set up e-checks or autopay before October 31 are not affected. Topeka has worked with Central Square to move the payment system to a new platform.