At least five people died and about 50 others were injured on Wednesday evening in the northern Mexican state of Nuevo Leon after a structure collapsed at a campaign event for the Citizens' Movement party, the local governor said.

The party's presidential candidate, Jorge Alvarez Maynez, said on social media that a gust of wind caused the stage to collapse at the event in the city of San Pedro Garza Garcia, a wealthy enclave near the industrial hub of Monterrey.

Alvarez said he was "OK" after being taken to a local hospital, but that members of his team were hurt and he was traveling back to the site of the accident.