The NFL is investigating the New York Giants' use of a handheld two-way radio in the fourth quarter of Sunday night's 10-7 victory over the Dallas Cowboys, according to a report by The New York Post.
The investigation comes after a formal complaint was filed by the Cowboys, according to the Post.
Coach Ben McAdoo was seen using a walkie-talkie to relay plays to quarterback Eli Manning when the Giants were having problems with their headsets early in the fourth quarter. Coaches are not allowed to hold any two-way radios during a game, a source told ESPN.