PSNI Chief Superintendent Stephen Cargin said he believes Pc Philippa Reynolds would have died instantly due to the force of the crash.
Ms Reynolds is believed to have been sitting in the rear driver's side seat when the unmarked police car was hit side on.
More top news
The building was once the tallest in Iran's capital and was on fire for several hours before it collapsed.
Vegetable lovers across the UK will be met with possible despair when they attempt to purchase the humble courgette from a supermarket.
Addressing the World Economic Forum, Theresa May said citizens voted for a "truly global Britain" when they opted to leave the EU.