Twelve people were also wounded, including a 29-year-old woman from Spokane, Washington, according to NBC affiliate KHQ.

Speaking Monday, the attorney general of Quintana Roo state, Miguel Angel Pech, said the dead included two Canadians, an Italian, and a Colombian who were killed after a lone gunman entered the Blue Parrot nightclub around 2:30 a.m. local time Monday morning and started exchanging fire with another person.

Pech said security personnel then intervened, but came under fire, according to AP.

