Chest X-ray or chest MRI with evidence of ongoing infectious or malignant process. - Subjects taking high potency opioid analgesics. - Previous exposure to secukinumab or other biologic drug directly targeting IL-17 or IL-17 receptor. - Ongoing use of prohibited psoriasis treatments / medications (e.g., topical corticosteroids, UV therapy) at randomization. - Any intramuscular or intravenous or intra-articular corticosteroid treatment within 4 weeks before randomization. - Subjects who have ever received biologic immunomodulating agents except for those targeting TNFα (investigational or approved). - Previous treatment with any cell-depleting therapies including but not limited to anti- CD20, investigational agents - Other protocol-defined exclusion criteria do apply