The NFL will investigate allegations that the Washington Redskins had a bounty program that paid players four-figure bonuses for jarring hits on opponents when Gregg Williams coached the team’s defense between the 2004 and 2007 seasons, a league source said Saturday. The source, speaking on condition of anonymity because of the sensitivity of the topic, said it is standard procedure for NFL officials to look into any accusations that league rules have been broken. League investigators will try to determine the facts of the case before drawing any conclusions about whether the team or individuals could face disciplinary action, said the person, who is familiar with the NFL’s intentions. The person declined to speculate about penalties if the NFL determines that violations occurred.