A ship taking migrants to Athens from Kos has had to turn back after a pregnant woman suffered complications. The ferry carried on later after the woman was treated in a hospital on the island of Kos and delivered 1,350 people to Piraeus, the port close to the Greek capital, according to The Rhodean website. It comes as another ship, the Eleftherios Venizizelos, docked at Kos in order to help relieve a crisis that many observers have described as "chaotic".