Australian pop star Kylie Minogue has alerted police to an online stalker -- a "deluded weirdo" issuing threats over Twitter, she wrote on the micro-blogging site on Tuesday.

The diminutive singer told her more than one million followers on the site that she adored her supporters, but one among them was not her 'lover' -- her nickname for her fans.

"I love 1,033,861 of you LOVERS, but 1 is not a lover, just a deluded weirdo making threat #andthatdoesnotmakeyouspecial So..police alerted," she tweeted Tuesday.

The announcement prompted a groundswell of support for the 43-year-old on the social networking site, with fans vowing to protect her and offering support.

"I hope whoever's threatening @kylieminogue knows there's more than 1,000,000 of us ready to jump to her defence," wrote one.

Former television soap star Minogue this year celebrates 25 years in the music business since her hit debut single "Locomotion" was released in 1987.

The singer, who has successfully battled breast cancer, has attracted unwanted attention in the past, reportedly receiving hundreds of threatening letters at her British home and office in 2003.