House Speaker John Boehner on Wednesday was to undergo a previously unscheduled medical procedure on his back, the Ohio Republican's office confirmed.

The procedure was only scheduled to keep Boehner away from the Capitol for a few hours.

"The speaker is having a minor, unscheduled medical procedure related to recurring back problems," Boehner spokesman Michael Steel told the Washington Examiner in an email.

Steel declined to elaborate.

News of the procedure was first reported by Politico.