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A Fairbanks man reportedly stabbed a man, puncturing his lung, during a fight at the downtown bus station early Thursday morning.

Robert William Vann, 42, has been charged with felony first-degree assault.

According to a criminal complaint filed in Fairbanks court Friday, a witness walked the wounded man to the Fairbanks police station lobby after the stabbing. The man identified Vann by his street name, which is familiar to police.

The man had an approximately 2-inch wound in his midsection and was taken by ambulance to Fairbanks Memorial Hospital.

Police detained Vann after finding him at Golden Heart Park. Vann denied stabbing the man but said a woman told him the man was talking about trying to rape her, according to the complaint.

Transit center video surveillance footage shows Vann riding a bicycle up to the man before pulling a knife and confronting him. Van leaves after a minute but returns and drives over the man's foot and rams the man's leg with the bicycle. The two scuffle for about 20 seconds and Vann can be seen stabbing the man on his left side, under his arm.

Contact staff writer Dorothy Chomicz at 459-7582. Follow her on Twitter: @FDNMcrime.