BARCELONA, Spain (AP) --  The police force for Spain's Catalonia region says the fifth suspect shot in the resort town of Cambrils has died and six civilians have been injured.

Police earlier Friday morning had said four suspects had been killed in the town south of Barcelona during a police operation to "respond to a terrorist attack."

The confrontation came about eight hours after a van swerved through a pedestrian walkway in a popular destination in downtown Barcelona, killing 13 people and injured an estimated 100 more.

The regional police said they cannot say how the six civilians were injured at the moment.

They earlier tweeted that they are investigating whether the Cambrils suspects were wearing explosive vests. Its officers planned to carry out several controlled explosions.

The force says it is working on the theory that the Cambrils suspects were linked to the Barcelona attack, as well as to a Wednesday night explosion in the town of Alcanar in which one person was killed.

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U.N. Secretary-General Antonio Guterres is condemning the terrorist attack in Barcelona, Spain, and extending his condolences to the families of those killed.

His spokesman, Farhan Haq, said the secretary-general "wishes a speedy recovery to those injured and hopes that those responsible for this heinous violence will be swiftly brought to justice."

"The United Nations stands in solidarity with the Government of Spain in its fight against terrorism and violent extremism," the statement said.

In Thursday's attack, a van barreled down a busy walkway in central Barcelona, swerving back and forth as it mowed pedestrians down. Thirteen people were killed and 100 were injured, 15 of them seriously, in what authorities called a terror attack.

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