Six people have been arrested after Saturday's apparent assassination attempt on President Nicolas Maduro in the Venezuelan capital of Caracas, the nation's interior minister said on national TV.

Maduro survived the assault after several drones armed with explosives flew toward him during a speech at a military parade, an attack he blamed on far-right elements and Colombia’s outgoing president, Juan Manuel Santos.

Those arrested are accused of “terrorism and assassination,” Interior Minister Néstor Reverol said Sunday.

Reverol said one of the detained had an outstanding arrest warrant for his alleged role in the August 2017 attack on a military base in Valencia.

Another of the detained people was previously arrested during the 2014 anti-government protests. Reverol said he doesn’t rule out further arrests.

Attackers used two DJI M600 drones that each carried 1 kilogram of C-4 explosive, Reverol said.

One of the drones flew over the presidential stage with the intention of being detonated by the attackers, but he said the authorities were able to cause it to lose control and detonate outside the area the attackers targeted.

Reverol said the second drone lost control and fell into an apartment building, where it exploded on the first floor.

Venezuela’s communications minister said Sunday the assassination plot was planned at least six months ago, according to an exclusive interview with Russian state-run media agency Sputnik.

Communications Minister Jorge Rodriguez told Sputnik “the majority of those responsible have been detained. Not only are they confessing, the government has also been able to examine the material that was in their possession, as well as some of the electronic devices they had including cell phones and computers.”

The incident took place as Maduro was speaking at a commemoration of the 81st anniversary of the Venezuelan national guard that featured a military parade.

Venezuela’s attorney general, Tarek William Saab, said he had ordered an investigation into the incident, assigning three prosecutors to the investigation.

Maduro appeared on national TV a couple of hours later, when he spoke about the investigation and arrests.

He said the Venezuelan political far right in collaboration with the Colombian far right and Colombian President Santos were behind the attack. He also blamed Venezuelans living in the United States.

“The preliminary investigation indicates that many of those responsible for the attack, the financiers and planners, live in the United States in the state of Florida,” Maduro said.

“I hope the Trump administration is willing to fight terrorist groups that commit attacks in peaceful countries in our continent, in this case Venezuela.”

The Venezuelan government has long blamed Colombia for plotting overthrows, and far-right elements in Bogota and Miami for attempting to undercut Maduro. Ivan Duque takes over as the Colombian President this week.

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