Dozens injured in hours-long clashes . Eyewitnesses accuse police of sparking the attack . People angry about pace of change since Mubarak stepped down . The government says it is cracking down on protesters and has arrested more than 1,000 people.
Dozens injured in hours-long clashes . Eyewitnesses accuse police of sparking the attack . People angry about pace of change since Mubarak stepped down . Massive protest called for this Friday .