Defense Secretary Robert Gates underwent successful surgery on his left arm Friday at Andrews Air Force Base in Maryland, said Pentagon Press Secretary Geoff Morrell.

“He is now at home and resting comfortably,” Morrell said Friday afternoon. “He will be back in the office on Monday morning.”

Gates will have to wear a split and sling for the next 10 to 14 days, Morrell said.

Gates told reporters Thursday about his injury.

“I was trying to attach a snowplow blade to a tractor up in the Northwest during the holidays and managed to tear the biceps tendon from the bone,” Gates said.

He also said that Deputy Defense Secretary Gordon England would serve as acting secretary Friday.

In February 2008, Gates injured his right arm when he fell outside his home in Washington, D.C., following an ice storm. He returned to work the next day.

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