Former NRL star Trent Merrin has been charged after allegedly stealing more than $100,000 of cryptocurrency.

Detectives arrived this morning at the Barrack Point home of the former Dragon as part of an investigation into an alleged fraud.

Merrin is accused of accessing a crypto account of a 29-year-old man and transferring $140,000.

The 36-year-old was arrested and taken to Lake Illawarra Police Station.

Following his retirement from rugby league in 2021, Merrin now describes himself as a "dedicated entrepreneur and investor with a passion for crypto".

9News understands that the investigation relates to Bitcoin.

Merrin has been charged and will face court next month. 

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