UPDATED — Feb. 5, 10 p.m. ET:
New York City police arrested four people Tuesday night who are believed to be connected to the drugs found in late actor Philip Seymour Hoffman's apartment, multiple news outlets reported.
Two law enforcement officials told the Associated Press at least one of the people arrested had the actor's cellphone number.
The New York Post reported officers raided an address in lower Manhattan around 7 p.m. after receiving a tip that a dealer who sold Hoffman heroin was there. Two men in their fifties, one woman in her twenties, and another man in his twenties were taken into custody and questioned, the report said.
More than 350 bags of heroin were recovered during the search at 302 Mott St., the New York Times reported, citing a law enforcement source.
On Wednesday, three of the four were charged with drug offenses, one related to heroin possession with the intent to sell and two with cocaine possession. The fourth person questioned wasn't charged.
Hoffman, an Academy Award-winning actor, was discovered lifeless in the bathroom of his fourth-floor Manhattan apartment Sunday morning with a syringe stuck in his left arm. Dozens of glassine envelopes containing heroin, some still full, were later found in his home by police.
Initial lab tests performed on the drugs confirmed the substance in the bags was heroin, but the tests did not find any trace of fentanyl, a powerful narcotic used to treat cancer patients that has recently been linked to dozens of deaths.
The night before his death, Hoffman withdrew $1,200 from an ATM at a supermarket near his New York City apartment while talking to two men with messengers bags, NBC News reported, citing police sources and bank records. The money was not recovered during a search of his apartment.
Hoffman had undergone treatment for addiction before, checking into rehab as recently as last year. In a 2006 interview with 60 Minutes, Hoffman said he would use "anything I could get my hands on."
An autopsy performed by the Office of the New York City Chief Medical Examiner was inconclusive. Toxicology tests are still pending and an official cause of death is yet to be determined.
"The cause and manner of death for Mr. Hoffman are pending further studies," the medical examiner's spokeswoman Julie Bolcer told BuzzFeed.