Attack on Venezuela's Guri Dam Carried Out With Use of Sniper Rifle - Maduro

"The attack was, of course, carried out with a sniper rifle. Let Venezuelans have no doubt that there are devil’s puppets behind this attack", Maduro said in an interview with a state-run TV broadcaster on Wednesday.

The president has called on the public to remain calm amid the power outage, adding that "very serious" damage had been inflicted on the power plant.

At the same time, NetBlocks, an NGO monitoring the governance of internet across the world, said that nearly 70 percent of Venezuela remained without internet access amid the blackout.

"It has been 55 hours since the onset of nationwide power outages in #Venezuela; 69% of the country remains offline after a new drop-in connectivity", NetBlocks wrote on Twitter.

READ MORE: Venezuela Minister Posts PHOTOS of 'Attacked Power Plant' to Show Blackout Cause

Venezuela’s Communication Minister Jorge Rodriguez told Telesur TV on Wednesday that the country’s national energy supplier was working to restore electricity amid the blackout.

Rodriguez also wrote on Twitter the same day that Thursday would be declared a public holiday, keeping schools and companies across the country closed for a third consecutive day.

The power outage hit Venezuela at around 1:30 p.m. (17:30 GMT) on Monday. Caracas said it had been caused by an attack on the Guri hydro-electric power plant that covers around 80 percent of the country’s demand for electricity. Several hours later, Rodriguez said electricity supply had been restored only to announce later that the power grid had been compromised again.

Over the past several months, Venezuela has repeatedly faced power outages. The largest blackout swept the country on March 7, prompted by what the authorities called US sabotage against the Guri dam.