The Spanish government has secured opposition support to dissolve Catalonia's parliament and hold new elections there in January in an effort to defuse the regional government's push for independence.
The main opposition Socialists said on Friday they would back a package of extraordinary measures to impose central rule on the region, whose threat to break away has unsettled the euro and hurt confidence in the eurozone's fourth-largest economy.
Prime Minister Mariano Rajoy, who wanted the Socialists' support in order to present a united political front against the secessionist Catalan government, will hold a special cabinet meeting on Saturday to start to process of imposing direct rule.
It would be the first time in Spain's four decades of democracy that Madrid will have invoked the constitution to effectively sack a regional government and call new elections.
Catalan leader Carles Puigdemont, a former journalist who is spearheading the secession campaign, has refused to renounce independence, citing an overwhelming vote in favour of breaking away at a referendum on October 1.
Socialist politician Carmen Calvo, a member of cross-party talks to establish what measures the government should take to impose direct rule on Catalonia, told TVE state television that January regional elections would form part of the package.
She gave no further details apart from saying the Socialists wanted a light-touch intervention.
The measures to impose direct rule could be approved by the Senate as soon as the end of next week, a spokeswoman for Spain's upper parliament said. Rajoy's People's Party [PP] has a majority in the Senate.
Catalan authorities said around 90 percent voted for independence though only 43 percent of voters participated. Opponents of secession mostly stayed home.
Spanish courts had ruled the referendum unconstitutional, but Puigdemont says the result is binding and must be obeyed.
The European Union has declined to mediate, saying the crisis is for Madrid and Barcelona to resolve.
British Prime Minister Theresa May said on Friday "people should be abiding by the rule of law and uphold the Spanish constitution", clearly siding with Mr Rajoy.