Four people believed to be connected to the drugs found in Philip Seymour Hoffman's apartment were arrested late Tuesday night.

According to cnn.com:

During the raid that led to the arrest of the three men and one woman, police recovered 350 tiny plastic bags of what is believed to be heroin, the officials said.

One of those arrested was found to have the actor's phone number in his cell phone.

More in the article at cnn.com.