One man was confirmed dead and hundreds more injured as supporters and opponents of President Mohamed Morsy clashed in Mansoura, Daqahlia governorate, on Wednesday.
Dozens of opposition protesters detained a group of Muslim Brotherhood and Jama'a al-Islamiya members in a mosque in Mansoura, prevented them from leaving for an Islamist rally aimed at supporting President Morsy under the sllogan: "No to violence. Yes to legitimacy."
The Muslim Brotherhood named the deceased man as Abdul-Hanin Annan.
The Freedom and Justice Party (FJP), the political arm of the Brotherhood, offered its condolences to Annan's family in a Thursday statement.
"The FJP strongly condemns all forms of violence, which aim to drag the country into chaos and anarchy, and to disrupt endeavors for development and stability," it said.
FJP officials meanwhile accused the remnants of the former regime, the opposition National Salvation Front movement and the Tamarod ("rebel") campaign of assaulting supporters of President Mohamed Morsy in Mansoura.
The party also said it will take legal action against them, warning of a violent backlash on 30 June if Egypt's streets witnessed similar incidents.
In a statement released on Thursday, the FJP condemned besieging the mosques in Mansoura and assaulting peaceful worshipers with weapons and swords.
“The Interior Ministry failed to do its job,” said Hisham al-Desouki, member of the FJP supreme body, calling on President Morsy and Prime Minister Hesham Qandil to take decisive action against those spreading chaos and violence in the country, as he put it.
Clashes between the two sides shook cities across Egypt on Wednesday, leaving 298 injured, including 243 in Daqahlia, 53 in Sharqiya and 2 in Gharbiya, according to Health Ministry figures.
Of the total number of injured persons, 47 were discharged after receiving treatment.
Another 251 patients were still receiving treatment in Mansoura International Hospital, Talkha, Zagazig University Hospital, Tanta University Hospital and Mansoura Emergency Hospital, said Khaled al-Khatib, head of the Health Ministry's Central Administration of Critical Care.
Three wounded during the violence were reportedly treated on the scene.
Several Egyptian governorates witnessed violence between pro and anti-Morsy protesters, days before opposition protests will demand early presidential elections on 30 June.
Edited translation from Al-Masry Al-Youm