Police say a Sioux Falls man was robbed one day this week by a man who pulled a knife as he left an apartment building.

Information Officer Sam Clemens says the 34-year-old man was leaving a building in the 3500 block of West 53rd Street around 1:30 p.m. Tuesday when he came upon a man between the building's secure doors and outside doors.

Clemens says the apartment resident thought the man was waiting for someone, but when he walked out the secure doors the man pulled a knife, threatened him and took his wallet and cell phone before taking off.

Clemens says the victim went back to his apartment and called police.

The robber is described as a white male in his 20s or 30s, tall with a thin build and a shaved head.

The victim was not injured.

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