CHICAGO (CBS) — A female employee at a Chase Bank bank in River North was stabbed in the neck Wednesday morning, prompting the closing of its downtown bank branches as a precaution.

Authorities said Friday afternoon a person of interest was being questioned in connection with the attack after being apprehended at State and Madison streets downtown.

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The attack happened at the bank branch in the 600 block of North Dearborn Street.

The employee was taken to Northwestern Memorial Hospital in critical condition.

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“There has been an incident at one of our branches near downtown Chicago today,” a Chase spokesperson told CBS 2’s Steven Graves. “Our thoughts right now are with our employee and their family.”