National Guard Major General Alejandro Perez Gomez appeared before a judge on Monday along with opposition politician Juan Requesens and colonel Pedro Javier Zambrano, Saab told a press conference.

To date, 14 people have been arrested and charged for allegedly taking part in the August 4 incident in which Maduro was seen reacting on live television to an off-camera explosion while he addressed a military parade in Caracas.

A second explosion was heard and then the assembled troops could be seen breaking formation and scattering in panic.

Maduro said the blasts were from explosives-laden drones sent to assassinate him.

Saab told journalists further arrests were possible.

Maduro has blamed the attack on "terrorist cells" in Florida led by a man called Osman Delgado Tabosky, whom he claims was behind the plot. The state is home to a large community of Venezuelan immigrants.

Maduro said this week that he would allow FBI agents to come to Venezuela to help investigate the alleged plot.

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