In one of the biggest raids in recent times, synthetic party drugs worth Rs.9.31 crore were seized by the anti-narcotics wing of Goa Police from an Italian national early Sunday.According to police, the drugs were seized from 54-year-old Italian national Vincenzo Rainton's residence in Anjuna, a coastal village some 20 km north of Panaji, notorious for availability of and trade in drugs."We found 30,750 square shaped pieces of LSD paper (mood-changing chemicals) and 4.7 grams of LSD liquid in his residence," a police spokesperson said.The value of the seized drugs is Rs.9.31 crore in international market, police said.Rainton has been visiting Goa on business and tourist visa for 14 years, police said.