Taylor Swift's NYC townhouse got an unwanted visitor Saturday ... and police arrested him on an unrelated warrant, TMZ has learned.
Law enforcement sources tell us ... cops received a 911 call in the afternoon for a "disorderly person" and responded to Taylor's fancy Manhattan neighborhood, where the pop superstar owns some pricey real estate.
We're told police ran a background check on the unnamed suspect and arrested him on a 2017 warrant for failing to answer a court summons in Brooklyn. It was unclear what the warrant was for. NYPD officials have not indicated whether they will recommend charges for this latest incident.
We've reached out to Taylor's team ... so far no word back.
TS' got more than enough reason to be nervous about people showing up at her place ... she's got a long, documented history with stalkers -- one was arrested less than two years ago for trying to get into her Manhattan home.
We break down Taylor's stalkers and more in our upcoming documentary "TMZ Investigates: Obsessed and Dangerous: Hollywood's Stalker Crisis" -- coming out Monday at 9/8c on FOX.