Philip Seymour Hoffman withdrew $1,200 from an ATM at a supermarket near his New York City apartment the night before he was found lifeless in his bathroom with a syringe still in his left arm, sources told NBC News.
The Oscar-winning actor, 46, withdrew the money in six transactions while talking to two men wearing messengers bags around 8 p.m. Saturday, sources said, citing bank records.
Hoffman was found dead hours later in his Greenwich Village apartment after an apparent drug overdose.
Law enforcement officials told NBC News on Monday that officials who searched Hoffman's apartment found 49 full bags of heroin, 23 empty bags of heroin, four bags of white powder believed to be cocaine, as well as various prescription drugs.
Detectives are investigating whether Hoffman purchased the drugs the night before he was found dead. No amount of money approaching $1,200 was discovered during the search of the apartment.
Investigators are trying to piece together Hoffman's last hours. He lunched at The Standard Grill, a Manhattan restaurant, on Saturday afternoon and paid a $120 bill, sources tell NBC.
Shortly before Hoffman withdrew the cash Saturday night, he spoke with his longtime partner, Mimi O'Donnell, on the telephone. She later told authorities that the actor seemed to be high during their conversation. It is the last confirmed contact with Hoffman.
The two labeled "brands" of heroin found in the apartment — "Ace of Spades" and "Ace of Hearts" — tested positive for heroin, and showed no signs of being tainted, law enforcement sources said.
A law enforcement official told NBC News that toxicology tests, which could take a few days to complete, will likely determine the actor's cause of death.
Multiple law enforcement sources told NBC News that authorities found six bottles of prescription drugs — including the blood pressure medication clonidine hydrochloride; the addiction treatment drug buprenorphine; the attention-deficit disorder treatment drug Vyvanse; the anti-anxiety drug hydroxyzine; and the muscle relaxer methocarbamol.
Hoffman had spoken openly about past substance abuse battles, saying he quit using drugs and alcohol and "got sober" at 22 years old.
But in early 2013, Hoffman checked himself into rehab for 10 days. He told TMZ that he had begun using prescription medicines, and his use escalated to heroin.
A statement issued Tuesday by Hoffman's publicist, Karen Samfilippo, said the actor would be buried in a private funeral service in New York but did not say if that meant the city or elswhere in the state and did not say when.
NBC News' Jonathan Dienst, Katy Tur and Daniel Arkin contributed to this report.