The European Commission, which oversees trade policy for the 27-nation European Union, has set anti-dumping duties of between 21.2% and 31.2% on Chinese producers of aluminium extrusions in the form of bars, rods, profiles or tubes.
The tariffs are lower than the provisional duties of 30.4% to 48.0% imposed midway through the investigation.
"I am very concerned about the UNHCR report and there are some specific cases that I really think need to be looked into closer," Ylva Johansson, the EU's home affairs commissioner, said during a visit to the island of Lesbos.
"I think the Greek authorities can do more when it comes to investigating these alleged pushbacks."
"One thing I would say is that we're on the side of openness. That's where we are. I don't want to see blockades of vaccines or medicines, I don't think that's the way forward either for us or any of our friends," Johnson said in a pooled interview for broadcasters.
He also denied a report that he said capitalism and greed gave Britain its success in vaccinating its population.