It did not say how many extra police would be sent.
"The majority of the Catalans did not want independence until quite recently, but now 70 percent of the population in Catalonia want the referendum and many people that were in the middle now say "we want to vote".because this idea of trying to repress a movement is not going to support the unity of Spain", the analyst said on Friday night. Each of the ferries has a capacity of over 6,500 passengers.
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And Turkish President Recep Tayyip Erdogan said his country is considering imposing sanctions against Kurdish northern Iraq . The parliament will convene for an extraordinary meeting on Saturday in order to discuss policy on Iraq.
Spain's central government and regional Catalan authorities argued on Saturday over who controls the regional police force that is considered key to the success of a planned independence vote for the north-eastern region.
Diego Pérez de los Cobos, a colonel in Spain's Civil Guards, was named "technical director" on Saturday to supervise the work of the Civil Guards, National Police and the "Mossos", a local Catalan police force, El País reported.
"They will be tasked with surveillance of public space and maintaining order and they will act in case the illegal referendum is maintained", the interior ministry said in a statement. A statement said the six declined to give evidence.
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The flight follows a week of heightened rhetoric from Washington and Pyongyang, with Trump and Kim Jong Un trading insults. He has also said that previous USA presidents allowed the North to develop its nuclear weapon.
They would join the roughly 5,000 state police normally stationed in Catalonia and around 17,000 Mossos officers.
A large and noisy demonstration lasting more than 24 hours in Barcelona against the raids and arrests dispersed on Friday afternoon after the officials were released. The Spanish government called the bill illegal and challenged it in the Constitutional Court.
Catalonia represents a fifth of Spain's 1.1 trillion-euro (£970 billion) economy and enjoys wide self-government.
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Without an outright majority, National would have to form a coalition with another party to remain in power. That equates to about half of all the votes likely to be cast in the nation of just under 5 million people.
The Catalan interior minister said the new state forces on the ground were one more step toward taking over the local police, a move that is seen as unlikely by most observers because it would be reminiscent of the 1936-39 Spanish Civil War, when the force was abolished. The region has about 5.5 million eligible voters.