Coronavirus: South Korea declares highest alert

South Korea has raised its coronavirus alert to the "highest level" as confirmed case numbers keep rising. President Moon Jae-in said the country faced "a grave turning point", and the next few days would be crucial in the battle to contain the outbreak.

Also in the programme: Senator Bernie Sanders has won the Nevada caucuses; and it's 100 years since the Russian scientist Leon Theremin invented his hands-free electronic instrument.

Picture: Market workers wearing protective gear spray disinfectant at a market in the southeastern city of Daegu on February 23, 2020. Credit: AFP via Getty Images.