FOXBOROUGH, Mass. — The NFL is investigating tampering charges against the Texans after the Patriots accused them of contacting New England director of player personnel Nick Caserio for the Houston general manager job.

ESPN.com reported that New England complained to the league after Texans executive vice president of team development Jack Easterby, a former Patriots chaplain, attended the team’s championship ring ceremony at the home of owner Robert Kraft. The Texans fired GM Brian Gaine the next day, less than 18 months after he took over the job.