Three people suffered life-threatening injuries in separate incidents across San Francisco on New Year's Eve, police said Thursday.

At 9:38, a.m. a 42-year-old man was seriously injured at Franklin and Bay streets in the Marina when a 26-year-old man shot him and fled. A 30-year-old man also suffered non-life threatening injuries during the encounter near Fort Mason. He is in stable condition. No arrest has been made. 

Later that night, at 1:30 a.m. on January 1, a 26-year-old man argued with a 25-year-old man and a 24-year-old-man at the 500 block of Howard Street (between 1st and 2nd) in SoMa. The oldest man then stabbed the other two men with a knife before he fled. The 25-year-old man suffered life-threatening injuries, while the third man had non-life threatening injuries. The victims were transported to a hospital. Police arrested the suspect.

Just nine minutes later, at 1:39 a.m., another stabbing occurred on the 4700 block of Mission Street (between Persian and Onondaga) in the Excelsior. A 17-year-old boy stabbed a 25-year-old man in the back with a knife after an argument. The teenager was able to flee the scene on foot. no arrest has been made. The victim was transported to a hospital with life-threatening injuries, officials said.

Anyone with information about any of the incidents listed above is asked to call the SFPD tip line at (415) 575-4444 or Text-a-Tip to TIP411 and begin the text message with 'SFPD.' Tipsters can remain anonymous.