One of three drones linked to the incident reportedly struck a Ukrainian Antonov without detonating. Berlin also plans tighter entry controls for Russian nationals and additional EU sanctions.
One arm of the German government reviews shutting the site while another shares a wall with it, exposing a split over how seriously the threat is taken.
The Russian House in Chișinău ceased operations after Moldova ended the bilateral agreement governing the center, the latest step in the country's efforts to reduce Russian influence.