The Houston Astros have been cleared by Major League Baseball of any wrongdoing in Game 1 of the American League Championship Series after the New York Yankees suspected they were using whistling sounds to convey signs to their hitters, sources told The Athletic's Ken Rosenthal.

During Game 1, Yankees coaches and players became angry with the Astros when they believed they heard a whistling sound coming from the opposing dugout, SNY's Andy Martino reported on Wednesday. Teams are prohibited from signaling to their hitters from the dugout through whistling or other means.

However, an MLB investigation into the matter found the Astros did not engage in any activities that were prohibited by the league, Rosenthal added.

MLB apparently had an official in the camera well next to the Astros' dugout during Game 1 and another in the back of Houston's dugout during Game 2. Neither of the officials or any of the umpires noticed whistling, according to Rosenthal.