Germany reintroduces border checks ahead of G20 summit in Hamburg
A German Federal Police officer stands on a street to control cars around the south German border town Passau, Germany, Tuesday, Sept. 15, 2015. (AP Photo)


Germany introduced increased border checks on Monday as part of security measures imposed ahead of the July 7-8 G20 summit in Hamburg, the Interior Ministry said.

The checks will be conducted until July 11 in a "flexible" manner along Germany's land, air and sea borders.

The measures were devised in coordination with neighboring countries and the European Commission.

Under the rules of Europe's passport-free travel zone, known as Schengen and of which Germany is a member, border controls can be conducted if security concerns warrant it.

Interior Minister Thomes de Maiziere has referred to security at the leaders' summit as his "highest priority."

A statement said that the measures are designed to prevent people planning violence from entering the country.

Protests are expected for the July 7-8 summit in Hamburg that will see Donald Trump's first visit to Germany as U.S. president. Russian President Vladimir Putin and Turkish President Recep Tayyip Erdoğan are also among the G-20 leaders.

Germany has been on high alert since a Tunisian national drove a steel-laden truck into a Berlin Christmas market in December, killing 12 people and injuring dozens.