[EU Commissioner for Migration and Home Affairs Diitris Avramopoulos gestures ahead of a debate at the European Parliament in Strasbourg]European Union countries that register arriving migrants also need detention and removal centres to handle those that are not granted the right to stay in the 28-nation bloc, European Migration Commissioner Dimitris Avramopoulos said. In an interview with the Euractiv information website, Avramopulous also said that countries facing the biggest migration pressure like Greece and Italy, should build such centres alongside expanding "hotspots" for handling those who have arrived and are waiting for a decision. "But detention or removal centres are also needed for those who receive the decision to return, particularly if there is a risk of absconding and if they are not willing to return voluntarily," Avramopulous told Euractiv.