Hours before Peso Pluma made his historic appearance at the MTV Video Music Awards, the singer was the target of a threat from a Mexican drug cartel.

Tuesday, a banner hanging from a bridge in Tijuana signed by the Jalisco New Generation Cartel called out the Genesis artist for his supposed “disrespect and loose tongue.” It also warned Peso Pluma to not appear at his scheduled concert in the border town on Oct. 14 or it will be his “last performance.”

Later that same day, Milwaukee’s Fiserv Forum announced the singer’s Thursday appearance at the venue was postponed. Similar announcements for other dates this week in Rosemount, IL and Indianapolis followed.

The next date that Peso Pluma will perform, according to his official website, is a Sept. 28 appearance in Reno, NV.  Three shows in California follow but nothing is listed for Tijuana.

Telemundo has reported that Tijuana mayor Montserrat Caballero said if Peso Pluma wants to perform at the city’s Caliente Stadium he still can. That Oct. 14 show at the 27,000 capacity venue has been sold out. Caballero also stated that normal security measures will be used because “at this point we have not determined that there is a risk.”

Peso Pluma, born Hassan Laija, is a central figure in a modern resurgence of the narcocorrido genre that focuses on the escapades of drug traffickers. In his song “Siempre Pendientes,” Laija sang about incarcerated Sinaloa Cartel leader Joaquin “El Chapo” Guzman. The Jalisco New Generation Cartel is a chief rival of the organization.

When Pluma took the stage to perform “Lady Gaga” it marked the first time a Mexican performed in the 38 year history of the VMAs.

The singer has yet to officially comment on the threat.