The San Francisco Police Department are on the hunt for someone who robbed and then beat to death a 72-year-old man in SOMA at Mission and Mary Streets. The murder occurred at around 1:40 a.m. today, and was witness by a security guard across the street.

A security guard from across the street witnessed what happened and tried to discourage the attacker. According to the Gate, the guard "saw the man going through the man's pockets and said ... 'Stop, I'm calling the police,' and the man ran off." This horrifying incident comes just one day after two people were stabbed nearby at Fifth and Stevenson Streets.