The United States has lashed out at the Maduro regime over the passing of a imprisoned opposition figure, describing it as a "stark reminder of the despicable character" of President Nicolás Maduro's government.
The former governor was found dead in his detention cell at the El Helicoide detention center in Caracas, where he had been incarcerated for over a year, according to rights groups and dissident factions.
The officials in Venezuela reported that the 56-year-old exhibited signs of a heart attack and was taken to a hospital, where he passed away on Saturday.
This latest statement from the United States is part of an intensifying war of words between the White House and President Maduro, who has accused the US of seeking regime change.
In recent months, the America has expanded its military presence in the Latin America and has conducted a number of fatal operations on ships it says have been used for moving narcotics.
US President Donald Trump has alleged Maduro himself of being the head of one of the region's narco-trafficking organizations—an allegation the Venezuelan president categorically refutes—and has warned of the use of force "on the ground".
"The detainee had been 'arbitrarily detained' in a 'facility for mistreatment'," said the US foreign policy division.
Díaz was detained in that year after joining many political opponents to dispute the outcome of that period's presidential election.
Venezuela's state-run electoral authority announced Maduro the victor, despite figures from dissidents suggesting their nominee had been victorious by a landslide.
The elections were largely criticized on the international stage as lacking in credibility, and sparked demonstrations across the nation.
The former governor, who governed the coastal region, was indicted of "promoting hatred" and "extremism" for disputing Maduro's claim to victory.
Venezuelan human rights group Foro Penal has raised concerns over deteriorating conditions for detained dissidents in the country.
"Another jailed opponent has died in Venezuelan detention centers. He had been held for a year, in solitary confinement," posted Alfredo Romero, the body's head, on a social network.
He noted that the detainee had only been allowed one meeting from his daughter during the entire length of his detention. He also mentioned that 17 detained dissidents have lost their lives in the nation since that year.
Dissident factions have also condemned the administration over the passing of the former governor.
María Corina Machado, a leading dissident figure who received this year's Nobel Peace Prize but who is in hiding to escape capture, said that the governor's death was part of a pattern.
"Sadly, it contributes to an disturbing and painful sequence of fatalities of detained dissidents imprisoned in the aftermath of the post-election suppression," she said.
The Democratic Unitary Platform declared that the former governor "died unjustly".
His own political party, Democratic Action (AD), also honored the ex-leader, noting he had been unjustly detained without proper legal procedure and had been kept in conditions "which violated his basic rights".
Tensions between the US and Venezuela have become ever more tense over what Trump has described as efforts to stop the influx of narcotics and immigrants into the US.
Maduro has in turn claimed the US of using its war on drugs as an pretext to depose his regime and access Venezuela's enormous petroleum resources.
The United States has also positioned a significant armada—its biggest movement in the region in many years—along with numerous soldiers.
In a connected action, the Venezuelan armed forces allegedly enlisted more than 5,600 recruits in one go on the weekend, in answer to what defense officials described as US "threats".
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