Former NRL star Nathan Merritt has been charged with drug and firearm offences as police investigate a ram raid robbery on a luxury Fendi store in Sydney’s CBD.

The former Rabbitohs great, who has publicly revealed he has 12 months to live as he battles liver cancer, surrendered himself to police after they raided his Marrickville home.

Officers allegedly found 12 grams of cocaine and a gel blaster firearm during the search.

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The raid came as police investigate a ram raid robbery on the high-end fashion store in the CBD early yesterday morning.

Merritt has not been charged over the store robbery.

The charges relate only to the drugs and firearm allegedly found at his home.

Nathan Merritt has been given about 12 months left to live. Credit: Getty

The 42-year-old was first diagnosed with oesophageal cancer last November after reporting pain in his stomach.

Just four months later the father-of-five was hit with a second devastating blow, diagnosed with liver cancer in February.

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Merritt said at the time he is resolute on remaining positive as he fights for life, despite not knowing how long he has left.

“I’ve been diagnosed with stage four cancer — oesophagus and liver cancer,” Merritt said in March.

“It’s a tough pill to swallow for my kids and family. But it’s good — it’s going to be a tough one, but I’m going to fight through it.”

The Rabbitohs icon has only known for a matter of weeks that both cancers were at stage four.

“All of this treatment is now just about trying to maintain it with chemo, and doing my best to stay alive as long as possible,” he added.