Wallström was in Åmål, central Sweden, on Monday, visiting a school, when she took time to speak to Swedish Radio, to express her dismay over the pictures coming out of Catalonia on Sunday, of people being beaten bloody by the police.
"The pictures that we saw were terrible, with a police violence that I think shocked many people. That could be noticed also from the reactions. And even though this was an illegal referendum, it should preferably be dealt with through dialogue. It is for the Spanish government and leadership to deal with this in a way that avoids this types of expressions, violent expressions and pictures of police violence," she said.
Asked what Sweden can do about it, she said that "we can only appeal to them to show restraint, and to return to dialogue" and that Sweden hopes a peaceful way forward will be found.
"Spain is of course an independent country, which must deal with this situation, so all we can do is to appeal to them to try to establish a better dialogue," she said.