Protests erupted overnight in Cairo and other Egyptian cities calling for the removal of President Abdel Fattah el-Sissi, in a rare show of dissent quickly quashed by authorities.
Hundreds of Egyptians took to the streets late Friday, chanting slogans including "Leave, Sissi!" and demanding the "fall of the regime".
At least 74 people were arrested, a security source told AFP, with plain clothed police patrolling sidestreets of downtown Cairo.
After overnight clashes with the protesters, security forces on Saturday maintained tight control of Tahrir Square — the epicenter of the 2011 revolution that unseated long-time autocrat Hosni Mubarak.
The country effectively banned protests under a 2013 law and a state of emergency is still in full effect.
"I think it's safe to say that the events of the past few weeks, including the development last night, pose the most serious legitimacy crisis facing Sissi," Nael Shama, a Cairo-based political analyst, told AFP.
The protests came on the back of an online call put out by Mohamed Aly, a disgruntled exiled Egyptian businessman, demanding Sissi be toppled.
The construction contractor has been posting videos from Spain that have gone viral since early September, accusing Sissi and the military of rampant corruption.
The president flatly denied the allegations last week at a youth conference and sought to assure Egyptians that he "was honest and faithful" to his people and the military.
In Aly's latest video posted early Friday morning on his growing social media accounts, he urged Egyptians to head to the streets after a highly anticipated Super Cup football match between Cairo powerhouses Al Ahly and Zamalek.
"No one shouted bread, freedom, social justice like in 2011, they escalated straight to 'Leave' from the first minute," Shama noted.
Thousands shared footage on social media documenting the demonstrations, which sprang up in several cities including sizeable crowds blocking traffic in Alexandria, Al-Mahalla, Damietta, Mansoura and Suez.
Shama, who wrote a book on Egypt's foreign policy, said the "totally organic" nature of the small-scale protests was "unprecedented."
"This is the first time people take to the streets in many years but I am not sure it will be the last," he added.
'Ball in government court'
Under the rule of general-turned-president Sissi, authorities have launched a broad crackdown on dissidents, jailing thousands of Islamists as well as secular activists and popular bloggers.
Sissi led the military ouster of former Islamist president Mohamed Morsi in 2013 and won back-to-back landslide elections after running virtually unopposed.
He has regularly invoked security and stability as hallmarks of his reign in contrast to the situations in regional hot spots such as Iraq, Libya and Syria.
During last week's youth conference, Sissi again took the opportunity to warn of the dangers of protesting.
On television Friday night, boisterous and pro-Sissi host Amr Adib lambasted Aly, the businessman, showing footage of him allegedly in a drunken stupor.
Adib urged his fellow countrymen to "take care of the country... because the Muslim Brotherhood want to raze it to the ground".
The Islamist group, once considered one of Egypt's most organized political forces, was outlawed as a terror group in 2013 after Morsi's overthrow.
Egyptians quickly took to social media to criticize Adib, a vocal backer of Mubarak during the 2011 revolution, for dismissing the protesters as "people against the country".
Discontent over rising prices has been swelling in Egypt, where Sissi's government has imposed strict austerity measures since 2016 as part of a $12-billion loan package from the International Monetary Fund.
Nearly one in three Egyptians live below the poverty line on less than $1.40 a day, according to official figures released in July.
Human Rights Watch urged Egyptian authorities on Saturday to "protect the right" to protest peacefully and demanded that those arrested be released.
Sissi flew Friday night to New York, where he is scheduled to address the U.N. General Assembly next week.
The president's office did not comment on the protests, when asked by AFP on Saturday.
"Now the ball is in the government's court," said Shama, the analyst. "They have to respond somehow."