CNN has pulled its financial support for the National Association of Black Journalists for its 2015 convention and career fair after the organization criticized the network on its diversity, reports TheWrap.com.

Earlier this month, the NABJ issued a statement that expressed concern over the departures of a number of African-American staff members, the story says. About a dozen African-American managers have resigned or were fired or laid off during the past year, the report adds.

After the statement, CNN told NABJ President Bob Butler that it was denying the association’s request for support.

“I understand the company has a right to make personnel decisions,” Butler said. ”There were not that many African-American managers at CNN in the first place. These layoffs have hurt our members tremendously. I am severely disappointed that CNN has ended our partnership.”