The state of emergency in Egypt on Thursday came after Wednesday's bloody assault in the capital, Cairo, sparked violence across the country that officials said claimed 278 lives.
The army-backed interim government on Wednesday imposed a month-long nationwide state of emergency, and curfews in Cairo and 13 other provinces after the violence on the day.
Gory photographs and video images of the Cairo bloodbath dominated social media networks, as world powers called for restraint and condemned the show of force by security forces.
At least four churches were attacked, with Christian activists accusing Morsi loyalists of waging "a war of retaliation against Copts in Egypt".
Hours after tear gas canisters first rained down on tents of protesters in the sprawling Rabaa al-Adawiya camp in eastern Cairo, an Agence France-Presse (AFP) correspondent counted at least 124 bodies in makeshift morgues there.
In a field hospital, its floors slippery with blood, doctors struggled to cope with the number of casualties, abandoning the hopeless cases, even if they were still alive.
The health ministry said 235 civilians were killed in the Cairo crackdown and in subsequent clashes across Egypt. The interior ministry added that 43 security personnel had lost their lives.
Morsi's Muslim Brotherhood spoke of 2 200 dead overall and more than 10 000 wounded.
Mohamed ElBaradei's resignation
Among those killed in Cairo was 17-year-old Asmaa al-Beltagui, daughter of wanted Muslim Brotherhood leader Mohammed al-Beltagui, a spokesperson for Morsi's movement said.
Britain's Sky News said a veteran cameraperson, Briton Mick Deane, was shot and killed while covering the assaults.
The violence prompted vice-president and Nobel laureate Mohamed ElBaradei to resign, saying his conscience was troubled over the loss of life, "particularly as I believe it could have been avoided".
"It has become too difficult to continue bearing responsibility for decisions I do not agree with and whose consequences I fear," he said.
The state of emergency went into effect at 4pm (2pm GMT) on Wednesday, with daily overnight curfews from 7pm to 6am.
The dramatic descent on the squares shortly after dawn came as a surprise to many. Security officials had originally spoken of gradually dispersing the sit-ins over several days.
Shortly after dawn on Wednesday, witnesses and an AFP correspondent said security forces fired tear gas before surging into Rabaa al-Adawiya, sparking pandemonium among the thousands of protesters who had set up the camp soon after Morsi was ousted in a military coup on July 3.
Men in gas masks rushed to grab each canister and dunk them in containers of water, as the main stage near the mosque of the camp blared Islamic anthems and protesters chanted "Allahu Akbar [God is greatest]".
Many Morsi supporters were given safe passage out of the camp, some flashing victory signs as they left through a security corridor.
A security official said that hundreds of people were taking advantage of the safe passage offer, but that some diehards had stayed behind to fight on.
By Wednesday evening, a security official said Rabaa al-Adawiya was "totally under control", adding: "There are no more clashes".
In the smaller of the protest camps, at Nahda Square in central Cairo, police said they had control of the area after two hours.
Television footage showed flattened tents, as women and children flanked by police and army troops were led out of the square.
Dozens rounded up in the dispersal were shown sitting on the ground, handcuffed and surrounded by security forces.
Authorities later said calm had been restored across the country.
Use of force widely condemned
Europe's leading powers, along with Iran, Qatar and Turkey, strongly denounced the use of force by the interim government.
The White House said Washington, which provides Egypt with $1.3-billion in annual military aid, "strongly condemns" the violence against the protesters and opposes the imposition of a state of emergency.
Interim prime minister Hazem al-Beblawi praised the police for their "self-restraint" and said the government remained committed to an army-drafted roadmap that calls for elections in 2014.
The Muslim Brotherhood urged Egyptians to take to the streets in their thousands to denounce the "massacre".
"This is not an attempt to disperse, but a bloody attempt to crush all voices of opposition to the military coup," Brotherhood spokesperson Gehad al-Haddad said on Twitter.
Interior Minister Mohamed Ibrahim said no more protests would be tolerated.
The anger against the movement was evident as residents of several neighbourhoods clashed with Morsi loyalists.
Clashes also erupted between security forces and Morsi supporters in the northern provinces of Alexandria and Beheira, the canal provinces of Suez and Ismailiya, and the central provinces of Assiut and Menya.
Crippling economic crisis
In Alexandria, hundreds of angry Morsi supporters marched through the streets armed with wooden clubs chanting "Morsi is my president".
An AFP reporter said they set fire to tyres and tore down pictures of army Chief Abdel Fattah al-Sisi, who led the coup against Morsi.
It was a dramatic turn of events for the Muslim Brotherhood, who just over a year ago celebrated Morsi's victory as Egypt's first elected president.
His turbulent year in power, marred by political turmoil, deadly clashes and a crippling economic crisis, turned many against the Islamist movement, with millions taking to the streets on June 30 to call for his removal. – AFP