Guatemalan prosecutors are still investigating whether a Mexican drug czar was killed in a gunbattle Tuesday outside a water park.
The nation's news media, citing unidentified police sources, have reported Joaquin Guzman -- the reputed head of the Sinaloa cartel was killed in Teculutan, a drug-trafficking stronghold in northeastern Guatemala.
Eight people died at the scene, and three others died later.
Drug prosecutor Geovanny Castro told a news conference that officials have no evidence Guzman was killed, but they also said three of the victims have yet to be identified. Castro said samples have been taken from the bodies to perform DNA tests.
In Mexico, Attorney General Eduardo Medina Mora said officials were working with their Guatemalan counterparts to confirm whether any of the victims were even Mexican.
"Whether a Mexican drug lord was among those detained or killed is just speculation," he said.
Guatemalan police detained three Mexicans and three Guatemalans after the shootout.
Guzman was arrested in 1993 in Guatemala. He escaped from a Mexican jail in 2001 by hiding in a laundry cart.