Thousands of demonstrators took to the streets of the Ethiopian capital, Addis Ababa, on Sunday, demanding the release of jailed journalists and others.
The BBC reports it was a rare show of opposition to the governing party, which maintains strict control over public life.
Protesters shouted slogans calling for freedom and justice.
A few police officers watched the demonstration in Churchill Avenue, for which permission had been granted.
More than 10 journalists in Ethiopia have been charged under an anti-terrorism law passed in 2009, according to the Committee to Protect Journalists.