Ian Mercer spoke to KABC-TV and several other media outlets gathered outside his house in Tarzana, California late Thursday night.

He said it’s been a “devastating day” for him and his family and said he has been talking to police and the FBI about the shooting.

He refused to answer questions and asked that his family’s privacy be respected.

Authorities say the gunman opened fire at Umpqua (UHMP’-kwah) Community College, killing nine before dying during an exchange of gunfire with officers.

A government official identified the killer as Chris Harper Mercer. The official provided the name on condition of anonymity because he was not authorised to speak publicly.

Residents have gathered at a Roseburg park for a vigil for the victims of the mass shooting.

The crowd gathered at around 08:00 at Stewart Park in the city, about 300km south of Portland. Many people held up candles as the hymn “Amazing Grace” was played.