"I have spoken to our Ambassador Mr.Navtej S.Sarna @IndianEmbassyUS. We are committed to help and protect all Indian citizens abroad," she tweeted.
Her response came hours after Punjab Chief Minister Amarinder Singh brought the incident of the killing of the Sikh man to Ms Swaraj's notice.
As per reports, a 32-year-old Sikh man, Jagjeet Singh, was stabbed to death outside a grocery store in California on Friday.
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.