Passengers evacuated from an Air Busan plane that was engulfed in flames this week at a South Korean airport will have their checked baggage returned to them, after authorities on Friday deemed the jet safe for a full investigation.

BUSAN, Jan. 31 (Yonhap) -- Authorities decided to begin a joint investigation of a fire-destroyed Air Busan plane early next week, officials said Friday, after completing safety checks on a large amount of fuel that is still stored at the wings of the plane.

Concerns have been raised about the safety risk of bringing portable batteries in carry-on luggage for flights, as a lithium-ion battery is suspected as the cause of the fire that destroyed Air Busan’s passenger plane on Tuesday night.