BLOOMINGTON — Minnesota prosecutors say no charges will be filed in connection with a fatal stabbing that occurred on a light rail in the Minneapolis suburb of Bloomington.

The Hennepin County Attorney’s Office said Friday that after reviewing the case, prosecutors determined they would not be able to disprove a self-defense claim.

Authorities said a 67-year-old man pulled out a knife and fatally stabbed 45-year-old Anthony Demetrius early Thursday after an argument escalated into a physical fight. The stabbing happened on the Blue Line light rail, near the Mall of America.

Court records show the suspect has past convictions for assault, disorderly conduct, and criminal sexual conduct.