Sweden's prime minister has called for biometric passport controls to be deployed at all external borders in the Schengen zone following last Friday's Paris attacks.Stefan Lofven will make the proposal at a European Union meeting on Friday in response to attacks that killed 129 people.He said that biometrics must be checked at the outer borders of the Schengen area "to prevent abuse of passports by look-a-likes".Inside Schengen, people can move around freely without passport checks. Lofven also recommended more camera surveillance and granting authorities greater powers to monitor digital communications such as Skype."Sweden will never become a safe-haven for terrorism and terrorists," Lofven said. "The message to those who travel from Sweden to commit crimes against humanity in other countries is that if they return they will be met by police, prosecuted and punished."He also said Sweden will prolong temporary border controls until December 11 – police have already raised the national terror alert level.