A performer at Kendrick Lamar’s Super Bowl halftime show unfurled a flag emblazoned with the words Sudan and Gaza in a protest over the two wars that are roiling the Middle East. Security at the stadium detained the performer shortly after waving the flag atop a car used as a prop in the performance.

No one involved with the production was aware of the individual’s intent,” the N.F.L. said in a statement about the protest during Kendrick Lamar’s show.

The man was an entertainer during Kendrick Lamar’s performance, but his demonstration was not part of the script, the NFL said.