Islamic State militants have the Euro 2016 soccer tournament in their sights though there is no concrete evidence at the moment of an attack being planned, the head of Germany's domestic intelligence agency has said.

The comments from Hans-Georg Maassen, head of Germany's Federal Office for the Protection of the Constitution, come after France's spy chief said Islamic State of Iraq and the Levant militants are gearing up for a campaign of bomb attacks on large crowds in France.

France, where terrorists last year killed 130 people in coordinated assaults on cafes, bars, a soccer stadium and a music hall across Paris, will host Euro 2016, which starts on June 10 and runs for a month at 10 stadiums across the country.

"We know that IS has the European Championship in its sights," Maassen told the Rheinische Post newspaper.