Pentagon investigators have cleared the commander of U.S. forces in Afghanistan, General John Allen, of any possible wrongdoing in connection to the David Petraeus sex scandal.
Allen had exchanged e-mails with Jill Kelley, one of two women at the center of the scandal that forced Petraeus to resign last year as head of the Central Intelligence Agency.
Allen's name turned up during the investigation. The Pentagon ordered a separate probe, saying the e-mails hinted at a possible violation of the rules of behavior for top military officers. The general denied any wrongdoing.
President Barack Obama has nominated General Allen to take command of all NATO forces in Europe. Senate hearings into the nomination were put on hold because of the investigation, but the president continued to back Allen.
General Allen took over command of U.S. forces in Afghanistan from General Petraeus in 2011 when Petraeus became head of the CIA.
Petraeus resigned when he admitted he had an affair with his biographer, Paula Broadwell.