Vienna Convention

Julian Assange has laid out his view on why Barack Obama’s seizure of property belonging to the Embassy of the Russian Federation to the United States violates international law.
The Wikileaks founder’s Tweets are reproduced in-full below.

1/ Expelling "diplomats" is perfectly lawful. But seizing diplomatic property is a clear and dangerous breach of the Vienna Convention.
— Julian Assange (@JulianAssange) July 14, 2017