A day after large scale protests against him, the Armenian Prime Minister has resigned.
Opposition supporters accused Mr Sargsyan of clinging to power after he was appointed prime minister last Tuesday, soon after finishing two five-year terms as president.
"The street movement is against my tenure. I am fulfilling your demand," he said in a statement.
Former prime minister Karen Karapetyan takes over as acting PM, reports said.
The announcement came soon after opposition leader Nikol Pashinyan was released from detention. Mr Pashinyan had been arrested on Sunday after televised talks with Mr Sargsyan collapsed.
As well as Mr Pashinyan, two other opposition politicians and some 200 demonstrators were held.