Washington, D.C.-focused local outlet Popville, short for Prince of Petworth, posted several images showing barbed wire being installed around the security perimeter of the Chinese Embassy.

The photos appear to show at least four workers installing the barbed wire atop an already hardened perimeter wall of block and iron fencing. 

Embassies in Washington face security risks, but the sudden decision to further harden the Chinese compound raises obvious questions: whether Beijing is responding to a specific threat, anticipating protests or unrest nearby, or preparing for the arrival of a senior official or foreign delegation.

We should also note that activist networks aligned with pro-China and Marxist groups have called for May 1 general strike actions aimed at disrupting the U.S. economy. It remains unclear whether the embassy's sudden security hardening is connected to those planned demonstrations or to some other threat stream.