MADRID - New disruptions to Catalonia's transportation network on Tuesday followed a night of clashes between activists and police over the conviction of separatist leaders, as Spanish authorities announced an investigation into the group organizing the protests.
Authorities said that three people were arrested and more than 170 others injured, including about 40 police officers and a person who lost an eye, during the clashes well into the early hours of Tuesday between angry protesters and riot police at Barcelona's international airport and elsewhere across the northeastern Spanish region.
Thousands of passengers were stranded at the airport, with many forced to walk with their luggage on highways and across fields.
The protesters were responding to an online campaign by Tsunami Democratic, a loose, leaderless grassroots group that uses encrypted messaging apps to call for peaceful disobedience.
Spain's caretaker interior minister, Fernando Grande-Marlaska, said that authorities were investigating the group.
Further protests by separatist groups were scheduled for Tuesday evening.
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