reuters:

The top U.S. commander in Afghanistan, General John Allen, is under investigation for alleged inappropriate communication with a woman at the center of the scandal involving former CIA Director David Petraeus, a senior U.S. defense official said on Tuesday.

The revelation threatens to fell another of the U.S. military’s biggest names and suggests that the scandal involving Petraeus - a retired four-star general who had Allen’s job in Afghanistan before moving to the CIA last year - could expand.

READ ON: Top U.S. commander in Afghanistan under investigation, scandal widens

30,000 inappropriate emails is kind of impressive.