It was unknown how many police were deployed.
Earlier yesterday, 18 Lutheran Church leaders issued an appeal in East Berlin calling on East Germany's communist government to approve broad democratic reforms and urging all sides to refrain from violence.
The Rev. Rainer Eppelmann, a Lutheran pastor in East Berlin, said the doctrinaire regime must "talk with the people about their wishes and needs."
West Germany's ARD television said many of the hundreds arrested during the weekend protests already had been sentenced to jail terms of up to six months.
The demonstrations coincided with the visit of Mikhail S. Gorbachev, the reform-minded Soviet president, for East Germany's 40th anniversary.
Church sources said a participant in a demonstration last week was run over by a train and lost both his legs.
Saechsische Zeitung, a government daily in Dresden, said a person was "seriously injured" when thousands of people tried to board freedom trains that passed through Dresden carrying East German refugees from Czechoslovakia to the West.
West German Chancellor Helmut Kohl denounced the East German government yesterday as "rigidly authoritarian."
Junge Welt, the Communist Party youth newspaper, said the "gang of Western news reporters" stirred up the protests.
Eppelmann, speaking in an interview with RIAS radio of West Berlin, said yesterday: "If the state does not send a clear signal soon and talk with the people about their wishes and needs, an escalation is possible. There is fear in the GDR [East Germany] that violence could soon reign."
Eppelmann, a leader of Demokratische Aufbruch [Democratic Awakening], is among those urging the country's increasingly restless young people to be clam.
Officials in West Berlin said Western tourists were allowed into East Berlin yesterday. They had been kept out since Thursday because of the anniversary celebrations.
Extra police patrols were visible throughout the divided city's eastern sector.
Including legal emigrants, more than 100,000 East Germans have gone to the West this year.
One of East Germany's star athletes, two-time Olympic skating champion Katarina Witt, said in Munich yesterday that her government must think about the causes for the exodus and that changes must be considered.
Witt, a member of the Communist Party, called the exodus "sad."
Der Standard, a respected Austrian daily, said yesterday the East German leadership would like to hire 80,000 Chinese to fill positions left vacant by the departure of young skilled workers. It quoted a "leading member" of the government's Free German Trade Union, who was not identified further.
East Germany has not made official reports of arrests or injuries. State-run newspapers carried a dispatch from the official news agency ADN calling the demonstrators "troublemakers."