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

BETHESDA, Md. — 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.

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

"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," announcer Dan Hicks told viewers.