Kendrick Lamar, one of hip-hop’s most venerated artists for the past decade, performed “Not Like Us,” a diss track aimed at Drake, to cap the Super Bowl halftime show in New Orleans, the first to be headlined by a solo rapper.

NEW ORLEANS — A performer who was part of Kendrick Lamar’s Super Bowl halftime show was detained by security after waving the Sudanese flag and Palestinian flag together with the words “Sudan” and “Gaza” written on them toward the end of the performance, the NFL said.