Police Scotland is appealing for witnesses following a collision on the A772 on Friday evening.
The incident occurred at around 7.30pm when a Ford Fiesta, a Ford C Max and an Audi A4 were involved in a collision on Gilmerton Road, near Dobbies garden centre.
Three people were taken to Edinburgh Royal Infirmary to be treated for injuries.
The road was closed while police carried out an investigation.
Inspector Tracey Robinson said: “We are appealing for anyone who witnessed this collision to contact police on 101.”