ANKARA, Nov 28 (Reuters) - Turkey condemned on Saturday the "heinous assassination" of Iran's top nuclear scientist and called for the perpetrators of the attack to be held accountable.

The foreign ministry also urged "all sides to act with common sense and restraint" in the wake of the killing of Mohsen Fakhrizadeh, who Western and Israeli governments believe was the architect of a secret Iranian nuclear weapons programme.

Earlier, Iran's supreme leader promised to retaliate for the killing, raising the threat of a new confrontation with the West and Israel in the remaining weeks of Donald Trump's presidency. (Reporting by Tuvan Gumrukcu; Writing by Dominic Evans; Editing by Alex Richardson)