Egyptian police used water cannon against Nobel laureate and pro-democracy leader Mohamed ElBaradei and his supporters as anti-Mubarak protests heated up Friday. Then ElBaradei was put under house arrest as riot police used tear gas and rubber bullets on protesters. The Muslim Brotherhood says at least five of its leaders and five former members of parliament have been arrested. Opposition groups say the new round of protests may make or break the movement to end President Hosni Mubarak’s 30-year rule. As tens of thousands demonstrated after prayers, the government shut down the Internet and cellphone text-messaging, as well as Cairo’s subway system. "It's over, I think, for the Mubarak regime," said Maha Azzam of the think-tank Chatham House. The U.S. State Department, which has held back on outright criticism of the clampdown, said it was “concerned” about the blocking of communications services—it issued the statement via Twitter.