Demise of Venezuelan Opposition Figure in Custody Labeled 'Abhorrent' by US Officials.

The American administration has criticized the Maduro regime over the death of a imprisoned opposition figure, labeling it a "reminder of the vile nature" of President Nicolás Maduro's government.

The former governor passed away in his detention cell at the El Helicoide facility in Caracas, where he had been held for in excess of twelve months, as reported by rights groups and opposition groups.

The officials in Venezuela said that the former governor exhibited signs of a heart attack and was rushed to a hospital, where he passed away on the weekend.

Escalating Rhetoric Between US and Venezuela

This latest intervention from the United States is part of an escalating diplomatic spat between the White House and President Maduro, who has alleged the US of attempting a change in government.

In recent months, the America has boosted its troop levels in the area and has executed a series of deadly operations on boats it asserts have been used for smuggling drugs.

US President Donald Trump has claimed Maduro himself of being the head of one of the area's narco-trafficking organizations—an allegation the Venezuelan president vehemently denies—and has hinted at armed intervention "via a land invasion".

"The detainee had been 'arbitrarily detained' in a 'torture centre'," said the American diplomatic office for the region.

Background of the Arrest

The opposition figure was taken into custody in that year after participating with several opposition figures to challenge the results of that period's national vote.

Venezuela's state-run national electoral body announced Maduro the winner, notwithstanding figures from dissidents indicating their nominee had triumphed by a overwhelming majority.

The electoral process were widely dismissed on the international stage as lacking in credibility, and ignited protests across the country.

Díaz, who led the Nueva Esparta state, was charged of "promoting hatred" and "terrorist acts" for questioning Maduro's claim to victory.

Reactions from Rights Groups and the Political Rivals

Venezuelan human rights group Foro Penal has expressed alarm over deteriorating situations for detained dissidents in the country.

"Yet another detained dissident has died in Venezuelan prisons. He had been imprisoned for a year, in segregation," stated Alfredo Romero, the organisation's president, on a social network.

He noted that the detainee had only been granted one visit from his family during the entire length of his imprisonment. He further stated that over a dozen detained dissidents have passed away in the country since that year.

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

María Corina Machado, a well-known dissident figure who received this period's Nobel Peace Prize but who remains in seclusion to evade detention, commented that the governor's death was not an isolated incident.

"Unfortunately, it contributes to an concerning and painful series of demises of detained dissidents held in the context of the after the vote crackdown," she said.

The coalition of rivals said that the former governor "died unjustly".

His own party, Democratic Action (AD), also honored the ex-leader, noting he had been wrongly imprisoned without fair treatment and had remained in circumstances "that should never have violated his human rights".

Wider International Tensions

Tensions between the US and Venezuela have become ever more tense over what Trump has described as attempts to curb the movement of narcotics and immigrants into the US.

• US air strikes on boats in the Caribbean and Pacific have killed over eighty persons.
• Trump has accused Maduro of "releasing inmates from his prisons and mental institutions" into the US.
• The US has designated two Venezuelan narco-groups as terrorist organisations.

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

The US has also stationed a significant naval force—its largest deployment in the region in decades—along with many soldiers.

In a connected move, the Venezuelan armed forces according to reports swore in thousands of recruits in one go on Saturday, in reaction to what military leaders called US "threats".