Germany's foreign minister Sigmar Gabriel warned that the ongoing isolation of Qatar by Saudi Arabia and its allies could lead to a war in the Gulf region, according to an interview he gave to Germany's Frankfurter Allgemeine Sonntagszeitung, although he added that he still saw a chance to defuse the tension.

"There is a danger that this dispute could lead to war," Gabriel said citing what he called a "dramatic" harshness in relations between allied and neighbouring countries in the Gulf. 

The foreign minister said personal talks this week with his counterparts from Saudi Arabia, Qatar and Turkey, and phone calls with the foreign ministers of Iran and Kuwait underscored his concerns.

"After my talks this week, I know how serious the situation is, but I believe there are also good chances to make progress."