RIVERSIDE (CBSLA) — Police say they have detained a man in connection with the stabbing of a 69-year-old man at the downtown Riverside Metrolink station that left him in critical condition.

Albert Lee, 69, was stabbed just before 8:15 a.m. Sunday morning while waiting for his train to Los Angeles on the platform of the station. He had just been dropped by a friend, Katerina Marley.

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“He’s a good person,” she said. “He’s not no person you would see running up and down the street, that’s why we can’t believe it.”

Surveillance video shows Lee walking with his hand on his neck, back to Marley, who rushed him to the hospital. Lee remains in critical condition.

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Raymond Demetrius Bonner (courtesy photo)

Raymond Demetrius Bonner, 39, was arrested early Monday on suspicion of attempted murder.

Police do not believe the suspect and victim know each other, and that the attack was random.

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The station was partially closed for several hours, but is now fully reopen Monday.