Hundreds of protesters battled police in the heart of Barcelona amid anger over the jailing of Catalan separatist leaders.
Masked protestors were seen blocking areas, damaging police vehicles, setting fire to large garbage bins, ransacking banks and attacking riot police officers with stones, cans and bottles.
Police responded with repeated volleys of foam bullets, smoke grenades, tear gas and water cannons.
The violence followed a largely peaceful demonstration that drew more than half a million people onto the streets of the Catalan capital.
Catalan interior affairs chief Miquel Buch distanced themselves from the riots, claiming "this kind of violence is unprecedented in Catalonia ... these people are not separatists".
Some 128 people have been arrested in the region over the past five days, with Spain's acting interior minister, Fernando Grande-Marlaska, warning that rioters faced up to six years in prison.
One of Afghanistan's worst earthquakes killed more than 800 people and injured at least 2,800, authorities said on Monday, as helicopters ferried the wounded to hospital after they were plucked from the rubble of homes being combed for survivors.
Israel pushed tanks deeper into Gaza City and detonated explosives-laden vehicles in one suburb as airstrikes killed at least 19 people on Monday, Palestinian officials and witnesses said.
India's Narendra Modi told Vladimir Putin on Monday that India and Russia stood shoulder to shoulder even in difficult times after the Kremlin chief cast the Indian prime minister as his "dear friend" and gave him a lift in his armoured limousine.
Chinese President Xi Jinping urged leaders to leverage their "mega-scale market", while Russian President Vladimir Putin showed support for Xi's ambition for a new global security and economic order that poses a challenge to the US during a regional summit on Monday.
South Korea has suspended a military radio broadcast that transmits to North Korea as part of measures aimed at easing tensions with Pyongyang, Seoul's defence ministry said on Monday.
Enjoy your favourite music back to back commercial free, tune in to the Music Mix everyday from 1 until 2 for the music you love and the news updates you need
Enjoy your favourite music back to back commercial free, tune in to the Music Mix everyday from 1 until 2 for the music you love and the news updates you need
Apple Inc. shares fell Monday after a closely followed analyst warned that demand for the firm’s new iPhone 16 Pro model has been lower than expected. Is this a sign that the AI software just isn’t ready?
Dubai’s current population is more than double compared to almost twenty years ago, which now stands at 3.7 million. Lots of families are also moving to the UAE now. So what does it mean for the property market?