Updated at 11:03 p.m. ETVenezuelan officials say that President Nicolás Maduro has escaped an assassination attempt unharmed.Maduro was giving a live televised speech in the capital city of Caracas on Saturday when, a government spokesman said, explosive-carrying drones went off.Communications Minister Jorge Rodríguez called the incident an "attack" on the leader, reports The Associated Press, and said seven National Guard soldiers were injured.Maduro had been addressing the national troops about the country's economy during an event the government says was meant to mark the 81st anniversary of the country's National Guard."At exactly 5:41 p.m. in the afternoon several explosions were heard," Rodriguez said, according to the AP translation, in a national address immediately following the incident. "The investigation clearly reveals they came from drone-like devices that carried explosives."But, the wire service adds, firefighters at the site of the explosion are disputing the government's account of what it called an "attack." Footage posted on Twitter by Venezuela channel NTN24 TV shows the moment the scene descended into chaos before the broadcast was cut off. Maduro is seen looking toward the sky in confusion. What looks to be hundreds of soldiers break formation before scattering.Maduro blamed the attack on far-right factions in Venezuela, in addition to the U.S. and Colombian governments, freelance reporter John Otis tells NPR."This was an assassination attempt, they tried to assassinate me," Maduro said in a televised address, later Saturday evening.Maduro named Colombian President Juan Manuel Santos as being behind the attack, according to "initial investigations," without elaborating.Reuters cites a Colombian government source as saying Maduro's allegation was "absurd" and that Santos was celebrating his granddaughter's baptism on Saturday. "He is not thinking of anything else, least of all bringing down foreign governments," the source said.Reuters adds: