AUSTRALIAN photographer Rachel Devine has been forced to speak out after her daughter's image was falsely circulated as a victim of the Manchester bombing.

The local mum is just one of many people around the world caught up in the heartless actions of sick internet trolls, in the wake of the devastating attack.

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Rachel took to Facebook yesterday to confirm her daughter was not a victim.

"I'll never understand the bizarre thing of pretending to be someone else online," she said debunked the rumours.

"Nor the tragedy at the concert. My thoughts go out to those parents."

Not only are the internet trolls who are issuing fake pleas for help taking advantage of the tragedy that has seen 22 people die in a terror attack, but they are sometimes causing further unnecessary grief by circulating images of people long deceased.

Four years ago Samantha Shrewsbury of Oxfordshire faced every parent's nightmare when her pregnant daughter Jay was murdered by an abusive partner.

This week she found her daughter's photo was used in a sick prank in the wake of the Manchester attack, and had to take to social media to assure the world her daughter was long-since dead.

In some cases, internet trolls target particular people because of their social or political views.

Mexican journalist Andrea Noel says she has been targeted in the past with thousands of rape and death threats for speaking out against sexual harassment.

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In a tweet yesterday, Noel pointed out that "anti-feminani" trolls had reported her as one of the missing in Manchester while she was also being harassed live on Mexican radio.

In another case, a troll used an 2014 fashion shot of a Down syndrome boy modelling for the Downs Designs label which was created by a grandmother who wanted fashionable clothes to fit her 9-year-old grand daughter.

In the fake tweet, a person claimed to be the sister of "Frank" who had gone missing after the bomb was set off.

The part-time college student and YouTube reviewer John behind ReportOfTheWeek, who reportedly earns more than $2000 a month for his reviews of fast food, posted a video today to disprove the rumours and offering his sympathies for the real victims.

A person who goes by the name of @GamerGateAntifa on Twitter circulated a picture of John (who does not give out his surname publically to protect his privacy) claiming the photo showed his missing son.

That tweet has been shared by more than 20,000 people.

In the video today, John says to the troll: "You're not my Dad. And, last I checked, I'm still alive".

Debunk reports of being a victim of the Manchester attack.

Circulating fake reports of victim are not the only fakes news on social media in the wake of the terror attack this week.

There have also been photos of Ariana Grande circulating, showing her covered in dirt and apparently smeared in blood. They are images that were taken on the set of Scream Queens two years ago and not in the wake of the arena attack.

Shortly after the bomb went off, some people circulated a false report of an armed person shooting a gun at a nearby hospital.