According to the Washington Post, President Barack Obama is dispatching an additional 13,000 US troops to Afghanistan beyond the 21,000 announced back in March. The latest surge has not been announced by Obama, and the additional troops primarily consist of support forces including engineers, medical personnel, military police, and intelligence experts.

With the unannounced 13,000, that will bring the increase that Obama has approved to send to Afghanistan to 34,000. It comes at the same time Obama is considering a request from General Stanley McChrystal, a top US and NATO commander in Afghanistan, for more combat, training and support troops. There are several options to weigh, including one for 40,000 additional forces.

An unnamed defense official told the paper, "Obama authorized the whole thing. The only thing you saw announced in a press release was the 21,000."

The paper did note, however, that the maximum number of US service members expected in the war-torn country by year's end - 68,000 - would remain the same.