DHAKA: Four people have reportedly been arrested as part of an investigation into the suspected heroin overdose death of actor Philip Seymour Hoffman.

Some 350 bags of heroin were also seized during the arrests in Lower Manhattan, unnamed police officials were quoted by US media as saying.

The Oscar-winning star, 46, was found dead at his Greenwich Village home on Sunday with a syringe in his arm.

Dozens of suspected heroin bags were found near his body.

Some were stamped with the ace of hearts and the ace of spades, which are said to be brand names for heroin that street dealers use.

No definitive cause of death has been given, as police try to piece together his final hours using surveillance video and inspecting computers found in his home.

Police say the heroin found in Hoffman`s apartment was not mixed with the synthetic narcotic fentanyl.

Fentanyl has been blamed for a number of recent overdose deaths.

He is reported to have withdrawn a total of $1,200 in six visits to a cash machine the day before his death, reports the BBC.

BDST: 1818 HRS, FEB 05, 2014