Alleged Stalker Arraigned

A 23-year-old man who was stabbed by a security guard at the home of celebrity fitness guru Gunnar Peterson was arraigned today on one count of felony assault.

Nicholas Marino is being held on $30,000 bail on charges stemming from an incident Wednesday night at the multi-million dollar Beverly Hills home of Peterson and his estranged wife Janet. Sources tell TMZ that Marino and Janet were at one point romantically involved, but the relationship ended roughly four months ago. Janet then alleged in court documents that Marino stalked and threatened her with violence.

Neither Gunnar nor Janet were home at the time of the stabbing.

If convicted, Marino could face up to four years in jail. He did not enter a plea in today's hearing and will be back in court on January 19th.