Three hundred drones took to the evening sky over the Han River in South Korea to dispense coronavirus prevention advice through a synchronised light display featuring images of hand-washing and social distancing.

A horde of pin-point lights lifted into the air in military-like formation on Saturday before rearranging themselves to form the image of a white face mask, with red circles symbolising the new virus which has led to almost 300 deaths in the country.

The 10-minute display, organised by the Ministry of Land, Infrastructure and Transport, also showed images of medical workers in protective suits and messages of support including “#ThanksToChallenge” written above a hand cradling a another flashing a thumbs-up, in reference to a social media campaign encouraging people to express their gratitude to health staff.