Last year, the Building 8 lab was set up to help Facebook develop its own hardware and keep consumers locked into its ecosystem -- the news feed, Facebook live, video calling and more.
Building 8 is staffed with hardware veterans and led by former Google executive Regina Dugan.
The social media giant is working on at least one other product, a standalone smart speaker that would compete with the Amazon Echo and Google Home, said the people, who asked not be named discussing unannounced products.
Both devices would run a Facebook-built voice assistant service, they said.
The unnamed 16-year-old suspect is also facing similar charges in connection to an assault of an 18-year-old man at a Taco Bell earlier that day.
The suspect will be charged as a juvenile since he was 15 at the time of the attacks, police said.
Pictures of three toothpicks sticking up from the seat were posted last month by a Facebook user, who said she noticed them just as she was about to sit down. Singapore, a wealthy city-state, has one of the lowest crime rates in the world.