PITTSBURGH — AT&T says it will close one Pittsburgh call center and curtail operations at another, which the union says will affect about 200 people.

AT&T spokesman Marty Richter said Saturday that the decision stems from “significant declines in call volumes” at the landline centers. He said employees of the business center and customer care center could go to other facilities in Missouri and New York state or could apply for other company positions.

The workers are members of CWA Locals 13500 and 13550 in Pittsburgh and service calls from AT&T business customers and consumer sales.

Local 13500 President Sandy Kmetyk late Friday called it “devastating news.”

Richter said the company is continuing to hire in sectors that are growing and remains the largest employer of full-time union labor in the country.