Muslim Brotherhood spokesman Gehad El-Haddad just confirmed his account of Morsy's arrest to CNN by phone.
Presidential guards arrested Morsy at the guards' headquarters, El-Haddad told CNN. He described it as "house arrest." He added that Morsy's presidential team was "entirely put under arrest as well."
[Updated at 7:42 p.m. ET, 1:42 a.m. in Egypt]
Morsy is "under house arrest," as are most members of the presidential team, according to a post on Muslim Brotherhood spokesman Gehad El-Haddad's Twitter account.
[Updated at 7:27 p.m. ET, 1:27 a.m. in Egypt]
At least eight people were killed and 343 were wounded in clashes across Egypt on Wednesday, the day the Egyptian military announced it had ousted Mohamed Morsy as president, according to the state-run al-Ahram news agency, citing the Health Ministry.
[Updated at 7:07 p.m. ET, 1:07 a.m. in Egypt]
Egypt's military reportedly is attempting a massive roundup of members of the Muslim Brotherhood, the Islamist movement that helped propel Morsy to power a year ago.
Arrest warrants have been issued for 300 members of the Muslim Brotherhood, according to the state-run Ahram newspaper website on Thursday, which cited an unnamed security source.
Egyptian security forces also have arrested the Muslim Brotherhood's political party leader, Saad el-Katatni, and its deputy, Rashad Al-Bayoumi, Egypt's official MENA news agency reported Wednesday, citing an unnamed military source.
[Updated at 7:05 p.m. ET, 1:05 a.m. in Egypt]
Egyptian security forces have arrested the Muslim Brotherhood's political party leader, Saad el-Katatni, and its deputy, Rashad Al-Bayoumi, Egypt's official MENA news agency reported Wednesday, citing an unnamed military source.
[Updated at 6:57 p.m. ET, 12:57 a.m. in Egypt]
U.S. President Barack Obama, in his first public statement on Morsy's ouster, says the United States is "deeply concerned by the decision of the Egyptian armed forces to remove President Morsy and suspend the Egyptian constitution," and that he has "directed the relevant departments and agencies to review the implications under U.S. law for our assistance to the government of Egypt."
Obama also called on the Egyptian military "to move quickly and responsibly to return full authority back to a democratically elected civilian government as soon as possible through an inclusive and transparent process, and to avoid arbitrary arrests of President Morsy and his supporters."
Here is the full statement, released moments ago by the White House:
"As I have said since the Egyptian revolution, the United States supports a set of core principles, including opposition to violence, protection of universal human rights, and reform that meets the legitimate aspirations of the people. The United States does not support particular individuals or political parties, but we are committed to the democratic process and respect for the rule of law. Since the current unrest in Egypt began, we have called on all parties to work together to address the legitimate grievances of the Egyptian people, in accordance with the democratic process, and without recourse to violence or the use of force.
"The United States is monitoring the very fluid situation in Egypt, and we believe that ultimately the future of Egypt can only be determined by the Egyptian people. Nevertheless, we are deeply concerned by the decision of the Egyptian Armed Forces to remove President Morsy and suspend the Egyptian constitution. I now call on the Egyptian military to move quickly and responsibly to return full authority back to a democratically elected civilian government as soon as possible through an inclusive and transparent process, and to avoid any arbitrary arrests of President Morsy and his supporters. Given today's developments, I have also directed the relevant departments and agencies to review the implications under U.S. law for our assistance to the government of Egypt.
"The United States continues to believe firmly that the best foundation for lasting stability in Egypt is a democratic political order with participation from all sides and all political parties -- secular and religious, civilian and military. During this uncertain period, we expect the military to ensure that the rights of all Egyptian men and women are protected, including the right to peaceful assembly, due process, and free and fair trials in civilian courts. Moreover, the goal of any political process should be a government that respects the rights of all people, majority and minority; that institutionalizes the checks and balances upon which democracy depends; and that places the interests of the people above party or faction. The voices of all those who have protested peacefully must be heard -- including those who welcomed today's developments, and those who have supported President Morsy. In the interim, I urge all sides to avoid violence and come together to ensure the lasting restoration of Egypt's democracy.
"No transition to democracy comes without difficulty, but in the end it must stay true to the will of the people. An honest, capable and representative government is what ordinary Egyptians seek and what they deserve. The longstanding partnership between the United States and Egypt is based on shared interests and values, and we will continue to work with the Egyptian people to ensure that Egypt's transition to democracy succeeds."