Catalans watched and wondered whether the ousted leaders would defy their firing and face arrest, escalating a political crisis that already appears to have no easy way out.
Speculation raged about the whereabouts of the dismissed Catalan President Carles Puigdemont and his deposed Cabinet, whose reaction will be key to whether Madrid's takeover will be smooth or face opposition.
The ambiguous Instagram post, accompanied by the words "Good morning" in Catalan and a smiley emoticon, left many guessing whether Puigdemont was inside the building. There was no indication of when the photo was taken.
As dozens of journalists, curious onlookers and bemused tourists gathered in the square outside the Gothic government palace in central Barcelona, residents expressed confusion about who was actually in charge of Catalonia.
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"What I really think is that nobody is in charge right now," she said.
At least one portrait of Puigdemont was still hanging on a wall inside the Catalan government's Generalitat building.
Puigdemont is likely to be accused of rebellion on Monday for pushing ahead with secession. Spain's government has said the ousted leaders could be charged with usurping others' functions if they attempt to carry on working.
"In the office, exercising the responsibilities entrusted to us by the people of Catalonia," said Josep Rull, who until last week was the region's top official in charge of territorial affairs.
Two police officers entered and left the building, followed minutes later by Rull, who told reporters and supporters that he would continue carrying out his agenda.
But there were no official events listed on the regional government's public agenda that is published online daily. Meanwhile, the two separatist parties in the former Catalan governing coalition held separate meetings to decide their next move.
Interior Minister Juan Ignacio Zoido said Monday that the government was giving the separatist politicians "a few hours" of time because the goal was "to recover normality in a discreet way and under the principle of minimal intervention" from central authorities.
Catalonia's regional parliament proclaimed independence from Spain in a secret ballot Friday. The Spanish government dissolved the legislature, fired the government and regional police chief and called a new election for December 21.
The vote to secede came after an Oct. 1 referendum in favor of independence that was deemed illegal by Spain's constitutional court.
Separatist parties and grassroots groups have spoken of waging a campaign of disobedience to hamper the efforts by central authorities to run the region.
A key factor will be how Catalonia's estimated 200,000 public workers would react to their bosses' dismissal, and whether any stay away from work in protest.
Secession moves by this wealthy northeastern region of 7.5 million have tipped Spain into its deepest crisis in decades.
Yesterday, hundreds of thousands took part in an anti- independence demonstration in Barcelona, calling for Catalonia to remain in Spain and backing Rajoy's use of unprecedented constitutional powers to seize wrest control from the pro- independence regional administration.
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