NEW : Tips lead authorities to the home where the violin was recovered , police said . The case is being investigated by the New York City Police Department and the FBI in conjunction with the NYPD's Internal Affairs Bureau. Three are in custody in connection with theft but have n't been formally charged . The violin , made by Antonio Stradivari , dates to 1715 and is worth millions . Orchestra offered a reward for safe return of the instrument .
NEW : Tips lead authorities to the home where the violin was recovered , police said . Police : Three are in custody in connection with theft but have n't been formally charged . The violin , made by Antonio Stradivari , dates to 1715 and is worth millions . Orchestra offered a reward for safe return of the instrument .