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It appears Kings of Leon drummer Nathan Followill needs a little more time to make a full recovery. 

The band canceled two weeks worth of shows earlier this month after Followill suffered broken ribs in a tour bus accident, and now they've had to cancel two more gigs.  The Kings were set to return to the road Thursday in Holmdel, New Jersey.  But now that concert has been called off, as well as Friday's stop in Pittsburgh. 

The full band is currently scheduled to return to the stage Sunday, August 31st, to headline the Made in America festival in Philadelphia.  After that they'll continue their "Mechanical Bull" tour through the fall. 

Get well soon, Nathan! 

Photo: Getty Images