A police officer was injured and five people arrested after protesters doused the front of an Israeli defence contractor’s London office in red paint on Saturday.
Organisers said dozens of activists had gathered outside Elbit Systems’s Holborn office to demand its closure.
Huda Ammori, a member of the anti-Israel campaign group Palestine Action, said in a statement it was “up to the people to take direct action to shut Elbit down for good.”
The group, which launched earlier this year, said it "has targeted Elbit sites across the country over a dozen times."