Update: 11:15 p.m., Sunday, Feb. 26: CHP now reporting that only the right northbound lane is closed as a result of a single-car accident with injuries on Highway 17 past Lark Avenue in Los Gatos.
A single-car crash, reported at 10:18 p.m. Sunday on northbound Highway 17, north of Lark Avenue, has closed both northbound lanes, according to CHP dispatcher Ellie Shumer.
"All the lanes are being blocked as of 10 minutes ago," Shumer said.
It's unknown how serious the injuries were resulting from the accident, Shumer added.
The CHP's website reported a "severe traffic alert" was in effect on northbound Highway 17 after Lark Avenue in Los Gatos.
The injury accident was blocking both lanes, it said.
Motorists are advised to expect delays and to use alternate routes. There is no estimated time of opening the roadway, the alert added.