Unrest in the economic and political crisis-hit Venezuela reached a new pitch after 20 people attacked a military base in the north-western city of Valencia.
At least 2 attackers were killed, one injured and seven were arrested.
Earlier, a video posted online showed uniformed men proclaiming they were rebelling against a "murderous tyranny."
The attack comes amid growing protests against President Nicolas Maduro's rule.
Crisis in Venezuela explained
Venezuela has an oil-based economy stemming from its vast energy reserves.
The slump in oil prices has compounded a pre-existent economic crisis, leading to severe shortages of food, medicine and other essential items.
Inflation in the country is at 700%.
This has sparked violent protests against the Maduro regime, leaving at least 100 dead since April.
Maduro claims victory in controversial constituent assembly vote
On August 1, Venezuelan President Nicolas Maduro claimed victory in the controversial election for the constituent assembly.
Electoral officials announced that the election turnout was 41.5% while the opposition, which has refused to recognize it, said 88% of voters had abstained.
The election was marred by violent nationwide protests leaving at least 10 people dead.
The US has responded by slapping sanctions on Maduro.
Why does Maduro want a new constituent assembly?
The election would lead to the replacement of the opposition-controlled legislative body, the National Assembly, with a new 545-member constituent assembly.
All members of the constituent assembly have been nominated by the Maduro administration.
The assembly can draft or adopt a new constitution, which Maduro feels would facilitate "reconciliation and peace" in a polarized country.
The opposition considers it a move towards dictatorship.
Maduro says "terrorist attack" sponsored by Colombia and US
Maduro praised the military for its "immediate reaction" in quelling the attack.
He said the incident was a "terrorist attack" carried out by mercenaries backed by anti-government leaders based in the US and Colombia.
Maduro said security forces have launched a manhunt for the escaped attackers.
A first lieutenant who had deserted military was among those arrested.
Rebel group releases video calling for action against Maduro
On August 6, a man claiming to be Juan Caguaripano said his rebel group 41st Brigade was taking a stand against "murderous tyranny of President Nicolás Maduro."
"This is not a coup but a civil and military action to re-establish constitutional order," he said.
The Venezuelan military has continued to remain loyal to the Maduro regime despite months of violent protests.
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