Death of Venezuela's Political Dissident in Custody Labeled 'Despicable' by United States Officials.

The United States has lashed out at the Venezuelan government over the passing of a detained opposition figure, labeling it a "clear indication of the abhorrent essence" of President Nicolás Maduro's rule.

The political prisoner was found dead in his prison cell at the El Helicoide detention center in Caracas, where he had been incarcerated for over a year, as reported by rights groups and political opponents.

The Venezuelan government stated that the former governor displayed indicators of a myocardial infarction and was rushed to a hospital, where he died on Saturday.

Growing Rhetoric Between Washington and Caracas

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

In recent months, the America has increased its armed forces deployment in the region and has executed a succession of fatal operations on ships it says have been used for smuggling drugs.

US President Donald Trump has accused Maduro personally of being the head of one of the country's cartels—an allegation the Venezuelan president strongly rejects—and has warned of the use of force "by land".

"He had been 'held without cause' in a 'facility for mistreatment'," said the US State Department's Bureau of Western Hemisphere Affairs.

Context of the Imprisonment

Díaz was detained in that year after being among many political opponents to challenge the outcome of that period's presidential election.

Venezuela's pro-government national electoral body proclaimed Maduro the victor, despite counts by rivals showing their candidate had won by a wide margin.

The vote were widely dismissed on the world stage as flawed and unfair, and ignited unrest throughout the country.

Díaz, who was in charge of the Nueva Esparta state, was charged of "stoking division" and "terrorism" for questioning Maduro's electoral win.

Responses from Rights Groups and the Opposition

Local human rights group Foro Penal has raised concerns over worsening conditions for jailed opponents in the Latin American nation.

"Yet another jailed opponent has lost his life in Venezuelan detention centers. He had been imprisoned for a twelve months, in segregation," 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 full duration of his imprisonment. He added that seventeen political prisoners have died in the country since 2014.

Dissident factions have also denounced the administration over the demise of Díaz.

María Corina Machado, a prominent dissident figure who won this year's Nobel Peace Prize but who remains in concealment to escape detention, said that Díaz's death was not a one-off event.

"Unfortunately, it adds to an alarming and difficult sequence of fatalities of jailed opponents detained in the aftermath of the after the vote suppression," she wrote.

The opposition alliance said that Díaz "passed away unfairly".

His own party, Democratic Action (AD), also honored the ex-leader, stating he had been unjustly detained without due process and had been kept in circumstances "which violated his basic rights".

Wider Geopolitical Strains

Frictions between the US and Venezuela have become ever more tense over what Trump has labeled efforts to stop the influx of narcotics and immigrants into the United States.

• US bombings on boats in the Caribbean and Pacific have claimed the lives of dozens of individuals.
• Trump has claimed Maduro of "releasing inmates from his prisons and psychiatric facilities" into the US.
• The US has designated two Venezuelan narco-groups as terrorist organisations.

Maduro has in turn claimed the US of using its anti-narcotics campaign as an justification to overthrow his socialist government and access Venezuela's vast petroleum resources.

The America has also stationed a sizable fleet—its largest movement in the region in decades—along with thousands of military personnel.

In a connected action, the Venezuelan military according to reports enlisted thousands of troops in a single event on the weekend, in reaction to what military leaders described as US "aggression".