S.F. police in standoff with suspect who may be armed

A family argument in San Francisco’s Ingleside neighborhood Thursday evening turned into a standoff between police and a suspect who may be armed.

The incident began after 6:10 p.m., when police responded to reports of a family argument in the area of Grafton and Ashton avenues.

The situation escalated into what a police statement described as “a critical incident/barricaded suspect.” It is not known at this time whether the suspect is armed, or how many people might be inside the home.

As of around 10 p.m., police were still in negotiations with the suspect.

John King is a San Francisco Chronicle staff writer. E-mail: jking@sfchronicle.com Twitter: @JohnKingSFChron