Inclusion Criteria

Inclusion criteria:

- Male or non-pregnant, non-lactating female patients

- Presence of RA classified by American College of Rheumatology (ACR) 2010 revised
criteria for at least 3 months before screening

- At Baseline: Disease activity criteria defined by ≥ 6 tender joints out of 68 and ≥6
swollen joints out of 66 with at least 1 of the following at screening:

- Anti-Cyclic Citrullinated Peptide (CCP) antibodies positive OR

Rheumatoid Factor positive and with at least 1 of the following at screening:

- High sensitivity C-reactive protein (hsCRP) ≥ 10 mg/L OR Erythrocyte sedimentation
rate (ESR) ≥ 28 mm/1st hr

- Patients must have been taking at least one anti-TNF-α agent given at an approved
dose for at least 3 months before randomization and have experienced an inadequate
response to treatment or have been intolerant to at least one administration of an
anti-TNF-α agent

- Patients must be taking MTX for at least 3 months before randomization and have to be
on a stable dose at least 4 weeks before randomization (7.5 to 25 mg/week For Japan
only: 6 to 25 mg/week)

Exclusion criteria:

- Chest x-ray with evidence of ongoing infectious or malignant process, obtained within
3 months prior to screening and evaluated by a qualified physician RA patients
functional status class IV according to the ACR 1991 revised criteria

- Patients who have ever received biologic immunomodulating agents except for those
targeting TNFα

- Previous treatment with any cell-depleting therapies including but not limited to
anti-CD20, investigational agents (e.g., CAMPATH, anti-CD4, anti-CD5, anti-CD3,
anti-CD19)

- Other protocol-defined inclusion/exclusion criteria may apply.