Separatist Catalan leaders on Saturday called on the Spanish government to enter into talks as Barcelona braced for fresh violence after days of clashes between police and protesters.
Nearly 200 people were hurt in another night of clashes with radical separatists hurling rocks and fireworks at police who responded with tear gas and rubber bullets.
A hardcore movement of young separatists, Arran, called for a new demonstration "against repression" for 1600 GMT in central Barcelona.
"We exhort the head of the government to fix today a day and hour to sit with us for unconditional talks," regional president Quim Torra said in a speech.
His demand for "unconditional" negotiations, addressed to Spanish Prime Minister Pedro Sanchez, appeared to be aimed at ensuring that a referendum on independence, currently a non-starter for Madrid, is up for discussion.
Barcelona has been rocked all week by protests against a Spanish court's jailing of nine separatist leaders on sedition charges over a failed independence bid.
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Emergency services said Saturday that 152 people were injured in overnight clashes in Barcelona, and dozens more hurt elsewhere in Catalonia, taking the total to 182.
Authorities had already reported 500 injured since protests started Monday even before the latest clashes erupted.
The interior ministry said 83 people were detained in the overnight violence, in addition to 128 arrests police had reported previously.
"This can't go on, Barcelona does not deserve this," said Ada Colau, the city's leftist mayor on Saturday, condemning "all kinds of violence".
Air in the Catalan capital was heavy with a burning stench as municipal workers cleared the streets of broken glass, rocks and rubber bullets, and repaired pavements where bricks had been ripped out.
"All this is very sad, and is not helping our cause," said Assumpcio Segui, a 75-year old pro-independence pensioner.
Torra urged demonstrators to remain calm, saying "the defense of rights and freedoms must always be expressed peacefully."