Brother sold our ancestral land without my consent. Can I challenge this?

I just found out my brother sold our ancestral land in Kerala without telling me. I was out of the country for a year and he completed the transaction in my absence. We both inherited this land from our father and have equal rights. I feel shocked and betrayed. Is there a legal way to challenge this sale? Can I prevent the new owner from taking possession? I'm worried and need to act fast.