Spanish prime minister Mariano Rajoy will visit Catalonia on Sunday to begin campaigning for his Popular Party, ahead of early elections in December, BBC reports.
Mr Rajoy is expected to address a meeting of supporters of the conservative party on Sunday morning.
His visit comes after 750,000 people rallied in Barcelona to protest against the detention of Catalan leaders.
The Catalan government declared independence in October, prompting Mr Rajoy to sack and jail its leaders.
The prime minister's visit on Sunday will be his first to the region since the upheaval, which saw the national government implement direct rule two weeks ago.