Syria's government and an opposition coalition on Thursday rejected the announcement by Kurdish parties of a federal region in the country's north.

Citing a foreign ministry official, Syria's state news agency SANA said the declaration "has no legal basis" and would "encroach on Syria's territorial unity."

READ: Kurds declare federal region in Syria's north: officials

The opposition National Coalition meanwhile warned against "any attempt to form entities, regions, or administrations that usurp the will of the Syrian people."