Melanie Eversley

USA TODAY

Actor was found Sunday lying on bathroom floor of his apartment with syringe in arm

Hoffman was last seen alive Saturday night

The actor has three children with costume designer Mimi O%27Donnell

Four people have been arrested in Manhattan and are being questioned in connection to potentially selling drugs to late actor Philip Seymour Hoffman, CBS News and the New York Daily News are reporting.

Police raided a Chinatown apartment at about 7 p.m. and took the four people into custody, the DailyNews reports.

The New York Times reports search warrants were executed in three apartments and that the four arrested were found with 350 bags of heroin.

The four were arrested at 302 Mott St. in Manhattan and taken into custody during the execution of a search warrant, Det. Brian Sessa of NYPD said early Wednesday. Drugs were found at the location, Sessa said.

When asked if the arrests were connected to Hoffman's death, Sessa said, "Not that we're aware of."

Three men and one woman were being questioned, CNN reports. The New York Postnamed the four people being questioned, all of whom in the story appear to deny any links to Hoffman or selling heroin.

The 46-year-old actor was found Sunday lying on the bathroom floor of his Greenwich Village apartment with a syringe in his arm.

Investigators found about 50 envelopes of what they believe is heroin, along with used syringes, prescription drugs and empty bags, according CNN and NBC, which cited unnamed law enforcement sources.

Investigators also found addiction treatment medication, blood pressure medication and a muscle relaxant, according to NBC News and CNN.

No traces of the powerful pain reliever fentanyl was found in the heroin, a police source told the DailyNews. Heroin laced with fentanyl has killed more than 20 people in Pennsylvania, the DailyNews reports.

A private funeral for Hoffman will be held Friday in New York City. Plans also are underway for a memorial service in New York later in the month, Hoffman representative Karen Samfilippo said in a statement obtained by USA TODAY.

Hoffman was last seen alive Saturday night and his body was removed from the apartment on Sunday night.

Hoffman has three children with Mimi O'Donnell, a costume designer.

Broadway theaters plan to dim their marquee lights for one minute starting at 7:45 p.m. Wednesday in Hoffman's memory.

Contributing: Donna Freydkin