Bolivia's attorney general on Wednesday ordered the arrest of exiled former president Evo Morales after the interim government accused him of sedition and terrorism.

Public prosecutors in La Paz signed a warrant for police to detain the 60 year old - who is in Argentina - and take him to the attorney general's office.

Mr Morales fled Bolivia last month after civil unrest broke out following his re-election in an October 20 poll widely dismissed as rigged.

The former trade union leader denounced the arrest order as "illegal, unfair and unconstitutional" on Twitter. "I'm not worried.

As long as I'm alive I'll continue with greater strength in the political and ideological struggle for a free and sovereign Bolivia," he said.