3 staffers injured in fire at Google tech event in Mountain View

Sameer Samat, VP of Product Management of Android and Google Play, appears on stage during the keynote address of Google I/O conference at the Shoreline Amphitheatre in Mountain View, Calif. on Wednesday, May 17, 2017. less Sameer Samat, VP of Product Management of Android and Google Play, appears on stage during the keynote address of Google I/O conference at the Shoreline Amphitheatre in Mountain View, Calif. on Wednesday, May ... more Photo: Paul Chinn, The Chronicle Buy photo Photo: Paul Chinn, The Chronicle Image 1 of / 3 Caption Close 3 staffers injured in fire at Google tech event in Mountain View 1 / 3 Back to Gallery

Three people were injured Thursday afternoon after a fire broke out during Google’s annual conference for developers at Shoreline Amphitheatre in Mountain View, authorities said.

It was not immediately clear what caused the fire reported just before 4 p.m., said Lynn Brown, a spokesman for the Mountain View Fire Department.

The fire broke out in the kitchen of a building during the company’s I/O conference, a Google spokesman said in a statement.

The three people — event staffers, according to Google — were transported to a nearby hospital for treatment for unknown injuries, Brown said. The Google spokesman said the injuries were minor in nature, adding that the staffers were receiving treatment.

Brown had initially said that one of the three staffers had sustained life-threatening injuries in the fire. The injured staffers were not Google employees.

No attendees of the expo were injured in the fire that broke out while the building was crowded — the conference drew more than 7,000 people Wednesday.

The fire was extinguished shortly after it was reported, Brown said. Fire investigators were at the scene trying to establish an origin point and cause of the fire, he said.

Michael Bodley is a San Francisco Chronicle staff writer. Email: mbodley@sfchronicle.com. Twitter: @michael_bodley