A 21-YEAR-old is urging social media users to regularly change their passwords after she found her Twitter account had been hijacked with terrorist propaganda.

Caitlin Holmes, from Woolston, had her account inundated with photos, videos and messages related to terrorism by the culprit.

Caitlin, who is currently backpacking across Australia for the next two years, said: "I woke up in the morning and my friend had messaged me and said to look at my Twitter.

"I looked at it and it appeared that Isis had hacked my Twitter.

"They changed everything and were posting all sorts of recruitment for Isis.

"They were posting really gruesome videos too."

Warrington Guardian:

Caitlin contacted Twitter and Counter Terrorism Police in Australia to explain the situation and they did not know why her profile had been targeted.

She added: "They unfollowed all the people I was following.

"I tried to change my profile picture but they kept changing it back.

"In the end Twitter suspended the account and I'm still suspended now.

"I got quite angry – I have been using Twitter for years and had built up my timeline."

Luckily the email address registered to Caitlin's Twitter account is not her main one, meaning her other social media accounts and personal details are safe from the hackers.

She said: "Everyone needs to be careful – keep changing your passwords."

Twitter's terrorism and violent extremism policy states: "You may not make specific threats of violence or wish for the serious physical harm, death, or disease of an individual or group of people.

"This includes, but is not limited to, threatening or promoting terrorism.

"You also may not affiliate with organisations that – whether by their own statements or activity both on and off the platform – use or promote violence against civilians to further their causes."