DOCTORS treating boxer Hector "Macho" Camacho for a gunshot wound to the face and neck said he suffered a heart attack early yesterday and his prognosis was "very poor".
Three-time world boxing champion Camacho was gravely injured in a drive-by shooting in Puerto Rico on Tuesday night.
"This is the toughest fight in the life of Macho Camacho," said Ernesto Torres, director of the Rio Piedras Medical Centre.
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"We are keeping him alive with medicine. He is a strong guy," Mr Torres added. "The prognosis is very poor."
Camacho, 50, was a passenger in a car driven by his friend, Alberto Yamil Mojica. They were sitting outside a bar when someone opened fire on them, killing Mr Mojica.
The shooting occurred near a popular shopping centre on Highway 167 in Bayamon, a suburban town west of the capital of San Juan.
Police have yet to make arrests or determine a motive for the attack.