Smoke has been detected at one of the wings of the Prime Minister's Office in Warsaw at 1:30 pm local time (11:30 UTC). Several fire brigades have been called onto the scene. Officially, the cause of the fire has been attributed to modernisation works conducted at the premises and has NOT been linked to any form of terrorist activity.
Meanwhile, the Polish parliament has interrupted its session with a minute of silence for the victims of the terrorist attack in London.