An Estonian startup is building a fleet of delivery robots that it hopes will be able to drop off groceries and takeaway dinners.

Starship Technologies said it had tested the robots in London, the US, and Estonian capital Tallinn.

Ahti Heinla told the BBC's Rory Cellan-Jones that there had been no serious incidents of the public interfering with the robots.

He hoped they could begin their deliveries in London before the end of 2016.

Hear more about Rory's visit to Tallinn in today's edition of Tech Tent at 16.00 BST on the BBC World Service or catch the podcast after transmission.