A group of some 30 activists stormed the Syrian embassy in Berlin on Sunday, confronting the Syrian ambassador, AFP quoted German police as saying.
Protesters allegedly broke through the mission's fence and entered the building in order to meet the ambassador.
According to police, embassy staff reacted coolly and activists were removed without violence.
On Saturday, police in London said they had arrested seven protesters who climbed the roof of the Syrian embassy there, waving a Kurdish flag, AFP said.
The incidents come after a spate of violence in Syria on Friday in which a Kurdish opposition figure, Mishaal al-Tammo, was killed.