President Recep Tayyip Erdogan on Saturday told German Foreign Minister Sigmar Gabriel to "know your limits" after he vehemently criticised the Turkish leader for interfering in Germany's upcoming elections.

"He knows no limits! Who are you to talk to the president of Turkey? Know your limits. He is trying to teach us a lesson... how long have you been in politics? How old are you?" Erdogan said in a televised speech, in a bitter personal attack on Gabriel.