Cara Delevingne’s house fire mystery deepens as investigators issue official ruling

The cause of the huge blaze that saw 100 firefighters descend on Cara Delevingne’s property is unknown (Pictures:Splash/EPA)The blaze at Cara Delevingne’s home has stumped the Los Angeles Fire Department as they found the cause of the fire to be ‘undetermined’.Despite weeks of investigations at the 31-year-old actor’s $7million home, the damage caused made it difficult to determine the cause and the case has now officially closed.However, a source told TMZ that ther