At about 2 a.m., officers were dispatched to Jones and Sutter Streets on reports that a limousine had crashed into a light pole, San Francisco police Officer Albie Esparza said.
Police said that a taxi cab and a limousine collided in an intersection, resulting in the limousine hitting a nearby light post.
"The vehicle lost control and sheared off the bottom sleeve of the pole," a San Francisco police dispatcher said. "It shattered and two pedestrians got hit with the debris."
A yellow alert was issued immediately following the accident, Esparza said.
Esparza said that a yellow alert notifies local hospitals of a medical emergency, in which a large number of victims need to be treated.
"It's basically a trauma alert to nearby emergency rooms," Esparza said.
Four victims were transported to San Francisco General Hospital and two victims were transported to St. Francis Memorial Hospital, all with non-life threatening injuries, Esparza said.
It is unknown how many of the victims were passengers, drivers or pedestrians, Esparza said.
Witnesses reported that the collision may have been the result of one of the vehicles running a red light, but Esparza said officers have yet to determine a cause.
"The police investigators have to meet with each witness and find out exactly what happened," Esparza said.