The property is in the name of the mother she has a right to do as she wishes. Though the elder son bears a huge amount to purchase the building and 1st,  2nd, and 3rd persons purchased the building with the mother in the name of the mother.  It is only go for an amicable settlement of the issue.

If the aggrieved brothers deserve any share in the property and they have documentary evidence to prove their rights and interest in the property sold by mother and third son, they can plan to file a suit for declaration, partition.

Consult a local lawyer and proceed as suggested.

Sir/Madam

A point in Sale deed is Open Residential Plot in place of Residential Building. Isn't a revenue Loss to Govt or a legal point?

Also no one came to claim property till 11/02/2024 while the property was sold out in July 2023. The seller mother-3rd son  fled from the spot only on this sunday and 1st & 2nd are still living in their respective Building Part. 

You can discuss your problems alone, you do not have to ask clarification for others problem.

On the basis of your initial query you were given advise of what can be done, if the mother and her son fled then the other brothers have to initiate legal action to overcome their grievances. 

If you are a buyer then better obtain a proper legal opinion before buying the property. 

Sorry ti disturb you Sir.

I am not  Buyer or Broker or third person But common man.

I am one of the sufferer i.e. 1st Brother(Eldest Son).

Yes, We both brother planning to take legal action.

I have posted my problems for suggestions