Death of Venezuela's Opposition Figure in Custody Described as 'Despicable' by United States Authorities.

The US government has lashed out at the Venezuelan government over the fatality of a imprisoned political dissident, describing it as a "stark reminder of the vile essence" of President Nicolás Maduro's regime.

The former governor passed away in his prison cell at the El Helicoide prison in Caracas, where he had been detained for over a year, as reported by advocacy organizations and political opponents.

The officials in Venezuela reported that the 56-year-old showed signs of a cardiac arrest and was rushed to a medical facility, where he succumbed on Saturday.

Intensifying War of Words Between US and Caracas

This recent criticism from the United States is part of an escalating war of words between the American government and President Maduro, who has accused Washington of attempting regime change.

In recent months, the US has boosted its armed forces deployment in the Latin America and has executed a series of fatal strikes on boats it claims have been used for moving narcotics.

US President Donald Trump has accused Maduro himself of being the chief of one of the country's narco-trafficking organizations—an accusation the Venezuelan president strongly rejects—and has warned of armed intervention "via a land invasion".

"The detainee had been 'held without cause' in a 'center of abuse'," said the American diplomatic office for the region.

Background of the Detention

He was taken into custody in that year after being among numerous political opponents to dispute the results of that year's national vote.

Venezuela's pro-government election council declared Maduro the victor, despite opposition tallies showing their candidate had triumphed by a overwhelming majority.

The elections were widely dismissed on the global scene as flawed and unfair, and triggered demonstrations throughout the country.

Díaz, who led the Nueva Esparta state, was indicted of "promoting hatred" and "extremism" for challenging Maduro's electoral win.

Reactions from Rights Groups and the Opposition

Venezuelan rights organization Foro Penal has expressed alarm over declining situations for detained dissidents in the South American state.

"Yet another jailed opponent has passed away in Venezuelan detention centers. He had been incarcerated for a year, in solitary confinement," posted Alfredo Romero, the body's head, on a social media platform.

He said that he had only been granted one encounter from his daughter during the whole time of his detention. He further stated that seventeen detained dissidents have died in the nation since that year.

Opposition groups have also condemned the government over the passing of the former governor.

María Corina Machado, a leading opposition leader who was awarded this period's Nobel Peace Prize but who is in concealment to escape arrest, said that the governor's demise was part of a pattern.

"Tragically, it joins an alarming and heartbreaking series of deaths of detained dissidents imprisoned in the context of the electoral crackdown," she posted.

The Democratic Unitary Platform stated that Díaz "was an unjust death".

Díaz's own faction, Democratic Action (AD), also honored the ex-leader, noting he had been wrongly imprisoned without fair treatment and had been kept in conditions "that should never have violated his fundamental rights".

Wider Geopolitical Tensions

Strains between the United States and Venezuela have become progressively worse over what Trump has called efforts to curb the flow of narcotics and migrants into the United States.

• US air strikes on vessels in the regional waters have killed dozens of persons.
• Trump has claimed Maduro of "releasing inmates from his prisons and insane asylums" into the US.
• The US has labeled two Venezuelan drug cartels as terrorist organisations.

Maduro has conversely alleged the US of using its anti-narcotics campaign as an excuse to overthrow his regime and get its hands on Venezuela's vast crude oil deposits.

The US has also deployed a sizable armada—its biggest deployment in the area in decades—along with numerous troops.

In a parallel development, the Venezuelan military reportedly enlisted more than 5,600 soldiers in one go on Saturday, in response to what army commanders described as US "threats".