Three men and one woman arrested in New York have been charged with drugs offences possibly connected to narcotics found at the home of film star Philip Seymour Hoffman following his death of an apparent heroin overdose, law enforcement officials said last night.

A post-mortem on Hollywood actor Philip Seymour Hoffman’s body is inconclusive, and tests will be needed to determine what caused his death, the New York City’s medical examiner’s office says.