Weslaco, TX (KRGV) — Carbon monoxide poisoning caused the accidental off-duty deaths of two Weslaco firefighters, according to police.

No evidence of foul play or criminal intent was found in the investigation into the Oct. 28 deaths of Weslaco Fire Lt. Juan Peña Jr. and firefighter Julia Divine Rocha, a spokesperson for the Weslaco Police Department said Friday.

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As previously reported, both firefighters were found unresponsive and pronounced dead after they were hospitalized. An autopsy was ordered, the department forwarded its findings to the forensic examiner's office, and the investigation is now closed, police said.

“We appreciate the public's patience and understanding, as investigations involving loss of life require time, thorough examination, and coordination to ensure findings are accurately established,” police said in a statement. “Our thoughts and deepest condolences remain with their families, fellow firefighters, and all those affected by this tragic loss.”