![police tape](https://media.nbcbayarea.com/2019/09/police-tape-file-e1602022373864.jpg?quality=85&strip=all&resize=320%2C180)
Drivers in San Francisco are asked to avoid the area of 26th Avenue and California Street after a two-vehicle crash, fire officials said.
Officials confirmed that one vehicle has rolled over in the collision and three people are involved.
No other details were immediately available.