She pointed to the Edinburgh Agreement, signed in the build-up to the Scottish independence referendum, as to how governments can work together in such circumstances. It is unclear what arrangement was reached.
Some of the mayors gathered with Catalan President Carles Puigdemont outside the headquarters of the regional government, the Generalitat Palace, as supporters waved the lone-star flag of the independence movement, the report said.
In response, Spain's Prime Minister Mariano Rajoy, said, "I say this both calmly and firmly: there will be no referendum, it won't happen".
The nationalist protests are not only a show of solidarity with Catalonia's mayors, but a push back on several Spanish government attempts to censure the referendum that Catalan lawmakers announced on September 6.
Police in recent days have conduced raids seizing printing materials, ballots and other materials to support the referendum.
United States markets close at record levels
Equifax EFX.N fell 2.35 percent after the Federal Trade Commission opened a probe into the company's massive data breach. The Dow Jones Industrial Average climbed 64.86 (+0.29 percent) to close at 22,268.34 for a fourth record close.
Redknapp fired after dismal Birmingham start
He said: "I thought we played well first half, I only asked them to do exactly the same in the second half as what we did first". Birmingham are 23rd in the table after their first eight league games, above only winless, newly-promoted Bolton Wanderers.
3 takeaways from upset loss at Memphis
Andrews finished with 142 receiving yards and the two scores, while Caleb Wilson led the team with 208 receiving yards. The American Athletic Conference announced Thursday that the Tigers-Knights game is rescheduled for September 30.