The Italian prosecutors’ office said that the works had been recovered during an investigation of the Amato Pagano clan of the Camorra Mafia family, which is associated with international cocaine trafficking.

In January, Italian prosecutors issued arrest warrants for several members of the clan and for criminals associated with them in a drug ring with contacts in Spain and the Netherlands, the Naples prosecutor, Giovanni Colangelo, said in a telephone interview. At the same time, Italian financial police identified assets belonging to the clan — with an estimated value of 20 million euros, or about $22.5 million — that could be confiscated. Those included real estate, two companies, a plane and a boat.

One of the gang members arrested in January told the police that the two paintings were in a house in the town of Castellammare di Stabia, near Naples. The house had at one time been occupied by Raffaele Imperiale, who Mr. Colangelo said was one of the leaders of the trafficking gang. (Mr. Imperiale is in Dubai, in the United Arab Emirates, Mr. Colangelo said, and Italian authorities have asked for his extradition.)

Lt. Col. Agostino Tortora, a financial police officer who worked on the case, said the paintings were found on Sunday afternoon, wrapped up in a cloth in a small hallway next to a kitchen.

Investigations are underway to determine when the paintings had come into the possession of the clan, he said. “We know they were stolen in 2002, we don’t know when they came here, or if they were stolen specifically for the Camorra, all that has to be investigated,” Colonel Tortora said.