The American administration has criticized the Maduro regime over the death of a imprisoned opposition figure, describing it as a "stark reminder of the abhorrent character" of President Nicolás Maduro's government.
Alfredo DÃaz was found dead in his cell at the El Helicoide detention center in Caracas, where he had been detained for over a year, as stated by advocacy organizations and political opponents.
The officials in Venezuela said that the man in his fifties showed symptoms of a myocardial infarction and was rushed to a hospital, where he succumbed on Saturday.
This new intervention from the US is part of an escalating war of words between the White House and President Maduro, who has claimed Washington of seeking his overthrow.
In recent months, the US has increased its military presence in the Latin America and has conducted a series of lethal operations on ships it asserts have been used for smuggling drugs.
US President Donald Trump has claimed Maduro directly of being the chief of one of the area's drug cartels—an accusation the Venezuelan president vehemently denies—and has threatened military action "via a land invasion".
"The detainee had been 'arbitrarily detained' in a 'facility for mistreatment'," stated the American diplomatic office for the region.
DÃaz was detained in that year after joining numerous political opponents to contest the results of that period's national vote.
Venezuela's pro-government national electoral body declared Maduro the victor, despite counts by rivals indicating their candidate had been victorious by a overwhelming majority.
The elections were widely dismissed on the world stage as lacking in credibility, and sparked demonstrations around the nation.
DÃaz, who was in charge of the coastal region, was charged of "incitement to hatred" and "extremism" for disputing Maduro's claim to victory.
Local rights organization Foro Penal has expressed alarm over deteriorating circumstances for jailed opponents in the Latin American nation.
"Yet another jailed opponent has lost his life in Venezuelan jails. He had been held for a year, in solitary confinement," posted Alfredo Romero, the body's president, on a social media platform.
He added that DÃaz had only been allowed one encounter from his daughter during the entire length of his detention. He further stated that seventeen political prisoners have lost their lives in the nation since that year.
Political rivals have also condemned the government over the death of the former governor.
MarÃa Corina Machado, a prominent political rival who was awarded this period's Nobel Peace Prize but who remains in concealment to avoid arrest, commented that DÃaz's death was not an isolated incident.
"Tragically, it adds to an alarming and difficult chain of deaths of detained dissidents held in the wake of the after the vote repression," she said.
The Democratic Unitary Platform declared that the former governor "passed away unfairly".
DÃaz's own party, Democratic Action (AD), also paid tribute to the politician, stating he had been unjustly detained without proper legal procedure and had stayed in situations "that should never have violated his basic rights".
Frictions between the US and Venezuela have become progressively worse over what Trump has labeled attempts to stop the movement of narcotics and migrants into the United States.
Maduro has in turn alleged the US of using its drug enforcement efforts as an pretext to remove his regime and gain control of Venezuela's enormous petroleum resources.
The US has also positioned a sizable naval force—its biggest movement in the area in many years—along with many military personnel.
In a related move, the Venezuelan armed forces according to reports inducted thousands of recruits in a single event on the weekend, in response to what defense officials described as US "aggression".
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