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.

Six people have died from the virus in South Korea and more than 600 have been infected.

Meanwhile, Italy and Iran have announced steps to try to contain worrying outbreaks of the virus.

In Italy, strict quarantine restrictions are in force in two northern "hotspot" regions close to Milan and Venice.

Around 50,000 people cannot enter or leave several towns in Veneto and Lombardy for the next two weeks without special permission. Even outside the zone, many businesses and schools have suspended activities, and sporting events have been cancelled including several top-flight football matches.

Amid the growing restrictions, the last two days of the Venice Carnival, on Monday and Tuesday, were cancelled.

Italy has seen two deaths and the number of confirmed cases has risen to more than 100 - 89 of them in Lombardy.