The federal watchdog for equal employment is investigating claims that Intel Corp. targeted workers for layoffs based on their age.

Nearly three years after the chip maker launched a series of layoffs that cut more than 10,000 employees globally, the U.S. Equal Employment Opportunity Commission’s Seattle office is working to determine whether the job cuts were discriminatory, according to a document from the agency reviewed by The Wall Street Journal.

The issue of potential age discrimination is recurrent in the tech industry, where the workforces at many firms skew younger and the pace of change is often rapid.

Following the Intel layoffs, dozens of former employees sought legal advice on whether they could sue, according to lawyers who received calls from the employees. Some of those former employees filed complaints with the EEOC, according to people familiar with the matter.

In one set of layoffs in May 2016, the median age of the 2,300 employees let go was 49 years old, seven years older than the median age of their peer employees who remained, according to Intel documents viewed by the Journal. Many of the layoffs in the U.S. occurred in Oregon, where Intel is one of the largest employers.