In recent weeks, rolling blackouts in Cairo and other cities have increased amid an energy crunch linked to shrinking revenues, depleted natural gas resources, lack of maintenance on debilitated power plants, and the government's inability to pay its debts to foreign oil companies.
Speaking to reporters, Prime Minister Ibrahim Mahlab said 300 attacks on electricity pylons nationwide have deepened the crisis, leading to a drop in production by up to 15 percent.
"Without sabotage, we already have a problem," he said. "This is increasing the problem to paralyze us totally."
State television and private pro-government media have regularly reported such attacks, usually referring to the assailants as supporters and members of the Muslim Brotherhood group of ousted President Mohammed Morsi.
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Since Morsi's ouster last summer, his supporters have held near daily protests, demanding he be reinstated and denouncing the military for deposing him.
At the same time, the country has seen a rising wave of militant attacks against police and the military, with radical groups claiming responsibility and vowing to avenge the killing and detention of hundreds of Islamists.
Mahlab said police have intensified their campaign to arrest saboteurs.
"Those who harm their country have no rights. We will continue to fight terrorism," he said.
The Interior Ministry, responsible for the police, accused the Brotherhood of gathering information about the electricity infrastructure through its supporters in the government in order to facilitate the attacks.
Interior Ministry spokesman Hani Abdel-Latif said the police identified 40 suspects, divided into six different cells, who have planned attacks against electricity infrastructure.
The electricity cuts were one of the main sources of public anger against Morsi during his turbulent year in office. The military overthrew Morsi -- Egypt's first democratically elected leader -- last summer amid massive protests calling for his resignation.
The death toll from violence during protests by Morsi supporters on Thursday and Friday has meanwhile risen to nine people, health ministry officials said today.