There have been clashes in the Armenian capital Yerevan between police and anti-government protesters who were trying to march on the presidential palace.
The march was blocked by police. Witnesses said around 20 people were detained.
Some protesters were reportedly armed with sticks and firecrackers which they threw at police, causing several injuries.
The march was led by a prominent opposition activist. Back in March, Armenia’s Constitutional Court rejected complaints that the previous month’s presidential election had been rigged.
The vote saw President Sarksyan re-elected to a second term but independent monitors said the ballot lacked real competition.