SAN FRANCISCO (KRON) – Investigations are underway into three homicides that happened within 24 hours of each other in San Francisco.

According to police, the first homicide happened in the area of Persia and Vienna in the Excelsior District Friday night. Early Saturday, police announced an arrest was made.

A second unrelated fatal shooting is also under investigation, according to police. The second homicide happened Saturday morning in the area of 25th and Connecticut. No other information was released.

The third was a double shooting that occurred in Potrero Hill Saturday afternoon.

Officers responded to the unit block of Dakota Street where they located two men suffering from gunshot wounds.

The victims, ages 49 and 54, were taken to a local hospital. One of the shooting victims died and the other remains in life-threatening condition.

Police say information related to the victims’ identities is not available at this time.

Multiple agencies are assisting with the investigation into this homicide.

San Francisco police are working to determine if there is any connection to this shooting and the earlier homicide near 25th and Connecticut streets.

Anyone with information is asked to call the 24-hour tip line at 415-575-4444.