(CNN) An Armenian protest leader was detained Sunday, shortly after talks with the country's newly-appointed prime minister broke down amid days of mass demonstrations.

Nikol Pashinyan, opposition MP and leader of the protests calling for Prime Minister Serzh Sargsyan's resignation, was taken in the capital Yerevan and brought to a local police station, according to Radio Free Europe/Radio Liberty (RFE/RL).

Earlier in the day, a highly anticipated meeting between Pashinyan and the prime minister lasted just minutes, before Sargsyan walked out.

The talks followed nine days of mass demonstrations in the capital, over concerns new prime minister Sargsyan -- who was previously president for 10 years -- could be in power too long.

Armenian policemen detain a protester during a rally in central Yerevan on April 21.

On Saturday, Pashinyan said in a video message posted on his Facebook page that he would be meeting "Sargsyan to discuss the conditions of his resignation and of [a] peaceful transfer of power."

Read More