A main road in Vauxhall, central London, was reopened on Monday after police sealed off the area to investigate an abandoned car.
A spokesman had said officers were looking at a potentially suspicious car on the south side of the River Thames. Britain is on its second-highest threat level after several attacks in the country in 2017.
The car was later declared not suspicious and the cordons were being lifted.
London road reopens after abandoned car declared not suspicious