The interior ministers of Austria and Germany say the EU must link efforts to control migration and improve security by establishing functioning outer borders and improving information exchanges among its members over terror threats.

They spoke to reporters Tuesday during a break in consultations among themselves and colleagues from Europe's three other German-speaking countries — Switzerland, Luxembourg and Liechtenstein.

Austrian Interior Minister Johanna Mikl-Leitner said a "Europe without internal borders can exist only when a European outer border" is functioning.

Citing figures of 5,000 radicals in Europe, she said the EU needed "systematic border controls ... where EU citizens first and foremost are the ones controlled."

German Interior Minister Thomas de Maiziere called for a freer exchange of information within the EU over suspects planning to strike European targets.