SAN BRUNO (AP) — Authorities in have arrested three people on suspicion of tying up, assaulting and yelling racial slurs at a black teenager after they found him with a female relative at their San Bruno home.

San Bruno Police Lt. Ryan Johansen tells the Mercury News 46-year-old Wilfredo Amaya of San Bruno, 46-year-old Haydee Arguello of San Bruno and 49-year-old Luisandor Suarez of San Francisco, were arrested without incident and booked into San Mateo County jail.

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Johansen says the suspects eventually untied the victim and allowed him to leave. He was treated at a hospital for unspecified injuries.

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Johansen says police began investigating after the 17-year-old boy went to the police department on Thursday to report the alleged crimes.

It was not immediately clear if the suspects have attorneys.

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Copyright 2019 The Associated Press.