ST. PAUL, Minn. (WCCO) – Authorities say a man was seriously hurt after an assault in St. Paul on Sunday, and they are seeking a suspect.

St. Paul police responded to 1926 Como Avenue, which is Fire Station 23, on a report of a man bleeding from his head. When officers arrived, a fire captain said he saw a man lying on the sidewalk behind the fire station and called for his colleagues to help.

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The man was taken to Regions Hospital with serious injuries. Authorities say a railroad spike was found near the victim, which they say may have been used during the assault.

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The victim couldn’t tell officers how he ended up behind the fire station, or who assaulted him. He remains in serious condition, and the incident is under investigation.

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Anyone with information about the incident should contact St. Paul police.