At least 400 IRS employees in Philadelphia are among the thousands expected to be laid off by the end of this week.

A group of Internal Revenue Service workers in Philadelphia were among those laid off Thursday within the federal agency, which already struggles to answer taxpayer calls in a timely manner, according to a union representative.

The IRS purge was the latest and most extensive batch of firings of federal employees in Philadelphia, part of a nationwide downsizing of the government workforce by the Trump administration that has reportedly hit more than 10,000 workers.