Susan Boyle's brother has voiced his concern for his sister's safety and said he fears she may be killed like John Lennon.

John Boyle, 59, is upset by the singer's “lack of security” and accused her management company of failing to take care of her.

It comes just 24 hours after Susan was confronted by an intruder at her home in Blackburn, Scotland on Tuesday night.

“Her management company are too busy counting the money Susan has made them to consider her safety,” John Boyle told The Sun newspaper.

"The family have told them several times that vast improvements need to be made to avoid something like this happening.

"This it the second time something has happened to Susan at her home and it is extremely worrying.

"Susan is a massive world star and needs better protection. You look at what happened to John Lennon in New York - it's really worrying."

The former Beatle was shot dead on the steps of his home in New York in 1980.

But despite her brother's concern, Britain's Got Talent star Susan said yesterday that she was “fine” after Tuesday's incident.

Susan Boyle - Through the Years