Montenegrin Prime Minister Milo Djukanovic tendered his resignation in Podgorica on Tuesday.
"I would like to inform you that I have decided to resign," Djukanovic told a news conference.
He has been in power in Montenegro since 1991, either as prime minister or president.
"I will remain at the helm of the Democratic Party of Socialists, which means that I will be contributing to Montenegro's progress," he said.
