BETHESDA, Md. (AP) — An omission in the Pledge of Allegiance had NBC issuing an on-air apology Sunday during the U.S. Open.

The network opened its broadcast with a montage that included children reciting the pledge, but the words “under God” and “indivisible” were omitted.

READ MORE: Dixmoor Boil Order Remains In Effect As Crews Continue Work To Identify Source Of Weeklong Water Woes

The backlash on social media was quick and harsh, with some tweets calling for a boycott of NBC.

READ MORE: CPD's 'Carve With A Cop' Brings Children, Officers Together

“We began our coverage of this final round just about three hours ago, and when we did it was our intent to begin the coverage of this U.S. Open championship with a feature that captured the patriotism of our national championship being held in our nation’s capital for the third time,” announcer Dan Hicks told viewers. “Regrettably, a portion of the Pledge of Allegiance that was in that feature was edited out. It was not done to upset anyone, and we’d like to apologize to those of you who were offended by it.”

MORE NEWS: Belmont Cragin Carjacking Leads To Fiery Crash, Multiple Other Parked Cars Struck

Copyright 2010 by STATS LLC and The Associated Press. Any commercial use or distribution without the express written consent of STATS LLC and The Associated Press is strictly prohibited.