Suffolk DA Tim Sini and other officials say two suspected drug dealers have been arrested in connection to a string of fatal overdoses on the East End in the town of Southold.

Sini says 45-year-old Justin Smith, of Smithtown, and 51-year-old Lavain Creighton, of Greenport, are accused of selling a mix of cocaine laced with fentanyl that led to nine overdoses, six of them fatal in the Southold and Shelter Island area. The DA is urging anyone who purchased cocaine in the past few weeks to throw it out immediately because it could be laced.

"The chances you have bought lethal product is extremely high," says Sini.

Acting Suffolk Police Commissioner Chief Stuart Cameron says the reason drug dealers add fentanyl is because it's cheap, but it can be very dangerous.

Creighton was arraigned in Southold. Smith was arraigned in Central Islip court where his attorney said his client didn't sell drugs.

MORE: Southold police say another overdose on North Fork may be linked to fentanyl-laced cocaine
MORE: Southold police say 6 people suffer from fatal overdoses in past week

"Basically, he's in the house, he's asleep in bed, they execute a search warrant, they bring in dogs, they search all over the place, they don't find anything. They bring him out of the house, they bring him to Riverhead and this morning they bring them to court, and he finds out he's charged with criminal possession and criminal possession with intent to sell," says Anthony Sheller, Smith's attorney.

Sini says there is evidence including text messages that link both men to the sale and possession of drugs.

"It is unfortunate that anyone would launch baseless attacks against law enforcement especially when law enforcement saved God knows how many lives," says Sini.

Prosecutors told the court that Smith had another open drug case, and he was held on $200,000 bail.

Sini says the charges against the two could be upgraded to manslaughter.

Creighton is facing 54 years in prison and Smith faces a potential life sentence.