Huge breakthrough in the robbery of Kim Kardashian could uncover her attackers.

Police are hoping that DNA traces found in the luxury Paris apartment where Kim Kardashian was robbed at gunpoint will lead them to her attackers.

The report coincides with the launch of a formal investigation by French prosecutors into the incident in which the reality TV star was allegedly bound, gagged and threatened with rape as a group of armed ransacked the private residence.

The investigation will focus on “armed theft in a gang, criminal conspiracy and kidnapping,” a source told the AFP news agency.

It’s believed that five men were involved and made off with million in jewellery in the robbery which took place ten days ago.

Meanwhile Kardashian is reportedly struggling to recover the personal cost of the experience, with a source revealing to E! News the 35-year-old is suffering from paranoia and is seeking professional treatment for her mental health.

Kanye has been by Kim's side since the Paris attack. Source: Getty

"Kim is doing better but she still has a long way to recover from the robbery," the insider told E! News.

"Kim is very paranoid still when she is alone. She has been having flashbacks and hasn't been sleeping well. Her security is always around her now.

"She has been receiving some professional counselling. Her friends and family have been really supportive. Her sisters and mum have been checking on her every day."

Listen: what's next for the Kardashians? Post continues below.