Police in Berlin, Germany, are hunting the gang, all from Libya and Syria, who are suspected to be behind the arson.
Worryingly the men who attacked the defenceless rough sleeper in a subway station were all known to police.
Six of the men were arrested last night after they were caught on CCTV setting the man alight.
Police launched their investigation after the homeless man was saved by a quick-thinking train driver.
The 37-year-old was sleeping at Schönleinstraße underground station when he was allegedly set alight by a gang of youths.
Police praised eyewitnesses for saving the man’s life after a train driver used a fire extinguisher to put out the blaze which destroyed the man’s belongings.
Officers investigating the attack, which took place at around 2am on Christmas Day, issued photos and CCTV of the suspects.
Eyewitnesses claim the gang fled into a subway and drove away now police have caught six of them.
According to local newspaper reports Karen Müller, spokesman for the Berlin prosecutor’s office has confirmed they have applied for arrest warrants.
In a video the men appeared to be laughing, smirking and talking after trying to set the man on fire.