Spanish authorities say that 80 people, including 46 police officers were injured overnight during the most violent of three nights of rioting over the imprisonment of Catalan separatist leaders.

A statement from the office of Spain's caretaker prime minister says that 33 people have been arrested. Four protesters have been jailed so far on provisional public disorder charges.

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A car catches fire next to a burning barricade during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Spanish authorities say that 80 people, including 46 police officers were injured overnight during the most violent of three nights of rioting over the imprisonment of Catalan separatist leaders.

Demonstrators take shelter behind a barricade during clashes with police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Thursday began with new road blockades across the northeastern region, including a main highway leading to France.

Protestors make barricades in the street during clashes with police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoEmilio Morenatti)

Protestors make barricades in the street during clashes with police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoEmilio Morenatti)

Firefighters and residents try to put out fires burning cars during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Firefighters and residents try to put out fires burning cars during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Firefighters try to put out fires on the street during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Firefighters try to put out fires on the street during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

The Spanish leader, Pedro Sánchez, is presiding over a meeting with experts from the interior and other ministries to analyze the security situation in the northeastern region.

A car catches fire next to a burning barricade during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

A car catches fire next to a burning barricade during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Thursday began with new road blockades across the northeastern region, including a main highway leading to France.

Thousands of people have also been marching peacefully since Wednesday toward the regional capital, Barcelona, where students are striking and which trade unions are planning to join on Friday.

Demonstrators take shelter behind a barricade during clashes with police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Demonstrators take shelter behind a barricade during clashes with police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Protestors make barricades in the street during clashes with police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoEmilio Morenatti)

Protestors make barricades in the street during clashes with police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoEmilio Morenatti)

Firefighters and residents try to put out fires burning cars during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Firefighters and residents try to put out fires burning cars during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Firefighters try to put out fires on the street during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)

Firefighters try to put out fires on the street during clashes between protestors and police in Barcelona, Spain, Wednesday, Oct. 16, 2019. Spain's government said Wednesday it would do whatever it takes to stamp out violence in Catalonia, where clashes between regional independence supporters and police have injured more than 200 people in two days. (AP PhotoBernat Armangue)