COUNTER-terrorism agencies are investigating reports a Brisbane man has travelled to the Middle East to fight death cult ISIS.

Family and friends raised the alarm yesterday after Ashley Dyball, 23, posted disturbing claims on social media that he was about to head to the “front line tomorrow #f***isis’.

“No news is good news. Miss everyone from home hope your (sic) all well #YPG #F***THEISLAMICSTATE,” he posted beside a different photo on Facebook showing him wearing camouflage and holding an AK-47 assault rifle.

It attracted dozens of comments online from stunned friends, with some questioning the photo and urging him to keep safe and contact them.

“I thought you were full of it when you messaged me. I seriously hope this is a bad joke! Skype me asap please,” one friend, Annie, wrote.

Another, Cameron, said: “It’s so believable though. If it was anyone else it would have been a joke.”

His friend Justin wrote: “I seriously hope for your sake and your friends and family you are kidding. If you are looking for attention, you got it, and we all love you bro. Come home before you can’t or you get a bullet in your head.”

Another friend, Lucy, said: “Ash you realise you can never return to Australia if this is all legit. What are you thinking.”

Friend Sean wrote: “I’ll give it to you mate, you have some f***ing balls along with that you got a death wish. I hope to god you are safe.”

It’s feared Dyball has linked with the Kurdish People’s Protection Units (YPG), who are fighting ISIS militants in Syria and Iraq.

It’s the same group former Queensland army reservist Ashey Johnston, 28, was fighting for when he was killed by ISIS militants in February.

It’s understood former NT Labor official Matthew Gardiner also travelled to the Middle East to support YPG units before his return to Darwin last month.

While Dyball’s parents refused to comment at their Brisbane business yesterday, counterterrorism sources confirmed they were investigating his movements.

They said Dyball — believed to have unsuccessfully tried to join the Army — had not been on their intelligence “radar’.

Using an alias “Mitchell Scott’, Dyball posted he had travelled through Amsterdam, Paris and Jordan, where he said he was at a fast food restaurant on May 5.

While refusing to comment on specific intelligence matters, Attorney General George Brandis warned Australians against travelling to Syria and Iraq.