Syria's Kurdish-controlled northern regions voted to seek autonomy under a federal system on Thursday, angering both the Damascus government and neighboring power Turkey with a move that could complicate new U.N.-backed peace talks.

The vote to unite three Kurdish-controlled provinces appears aimed at creating a self-run entity within Syria, a status that Kurds have enjoyed in neighboring Iraq since the fall of Saddam Hussein in 2003.

The proclamation is nevertheless an open challenge to many of the sides in Syria's five-year-old civil war, as well as their international sponsors, who have mainly been battling for control of what they say must remain a unified state and have dismissed any unilateral move toward federalism.