Venezuela will set up a formal inquiry into claims that deceased President Hugo Chavez's cancer was the result of poisoning by his enemies abroad, the government said.

Acting President Nicolas Maduro vowed to open an investigation into the claims, first raised by Chavez after he was diagnosed with the disease in 2011.

"We will seek the truth," Maduro told regional TV network Telesur. "We have the intuition that our commander Chavez was poisoned by dark forces that wanted him out of the way."

Foes of the government view the accusation as a typical Chavez-style conspiracy theory intended to feed fears of "imperialist" threats to Venezuela's social system and distract people from daily problems.

Foreign scientists will be invited to join a state committee to probe the accusation, Maduro said.

Maduro, 50, is Chavez's successor and is running as the government's candidate in a snap presidential election on April 14 that was triggered by the president's death last week.

International observers

Venezuelan electoral authorities said on Tuesday that they had invited international organizations to observe the upcoming presidential election.

Invitations had been extended to the Union of South American Nations, the Southern Common Market and some 50 other international bodies, said the National Electoral Council.

The race to determine Chavez's successor will be held on April 14, and some 18.9 million people are eligible to vote, according to the CNE.

So far the CNE has recognized seven of the eight applicants for candidacy, including Maduro from the ruling party and opposition leader Henrique Capriles.

The application of Pana Change party nominee Gonzalo Contreras was rejected for the failure to submit his management plan.

Muduro is trying to keep voters' attention firmly focused on Chavez to benefit from the outpouring of grief among his millions of supporters. The opposition is centering its campaign on portraying Maduro, a former bus driver, as an incompetent who, they say, is exploiting Chavez's demise.

"Let's take the president (Chavez) away from the political debate, out of respect for his memory, his family, his supporters," opposition candidate Capriles' campaign chief Henri Falcon told reporters.

Polls from before Chavez's death gave Maduro a lead over Capriles of more than 10 percentage points. Capriles lost to Chavez by 11 percentage points in October.

Capriles has tried to jump-start his campaign with accusations that Maduro and other senior officials lied about the details of Chavez's illness, hiding the gravity of his condition from Venezuelans.

That sparked a torrent of attacks, with senior government officials using words such as "Nazi" and "fascist" to describe Capriles, who has Jewish ancestors.

In a televised message, Information Minister Ernesto Villegas read a letter to the "sick opposition" from the late president's daughter, Maria Gabriela Chavez, who has at times been viewed as a possible future successor.

"Stop playing with the pain of a nation and a devastated family," she wrote. "It is unfair, inhuman, unacceptable that they now say we were lying about the date of his (death) ... focus on politics, don't play dirty."

Capriles was quick to respond with a flurry of tweets.

"Never, in all these years, have I offended the president or his family. If one word has been taken thus by his family, I'm sorry," he wrote on Twitter.

"I don't offend families as they have mine. They have even called me a Nazi, when my great-grandparents were murdered in a Nazi concentration camp," he added.

Reuters-Xinhua

(China Daily 03/14/2013 page11)