• The participants has moderately to severely active CD, unresponsive or intolerant to their current standard of care (SOC).

• The participants weigh ≥10 kg at the time of screening and enrollment into the study.

• Participants with Crohn's disease (CD) diagnosed at least 1 month before screening. Participants with moderately to severely active CD defined by a Pediatric Crohn's Disease Activity Index (PCDAI) \>30 and an simple endoscopic score for Crohn's Disease (SES-CD) \>6 (or an SES-CD ≥4 if disease is confined to terminal ileum) at screening endoscopy.

• Participants who have failed, lost response to, or been intolerant to treatment with at least 1 of the following agents: corticosteroids, immunomodulators (eg, azathioprine (AZA), 6-mercaptopurine (6-MP), methotrexate \[MTX\]), and/or tumor necrosis factor (TNF)-α antagonist therapy (eg, infliximab, adalimumab). This includes participants who are dependent on corticosteroids or exclusive or partial enteral nutrition to control symptoms and who are experiencing worsening of disease in the moderate-to-severe range when attempting to wean off corticosteroids or discontinue exclusive enteral nutrition.

• Participants with extensive colitis or pancolitis of \>8 years' duration or left-sided colitis of \>12 years' duration must have documented evidence of a negative surveillance colonoscopy within 12 months before screening.

• Participants with vaccinations that are up-to-date based on the countrywide accepted schedule of childhood vaccines.