Brother trying to take dead father's property by force. What to do?

On the face of the information provided by you a suit for partition will have to be filed in Jharkhand. However, you need to inform as to how the 2 properties in Delhi were taken by each of you i.e. the exact terms of the said agreement/settlement and whether any relinquishment took place

Keeping in view that there is no will , your elder brother cannot take away the Jharkhand property unless the rest of you have given your written consent by signing a relinquishment deed. However, you can claim your share in the property by contesting a case i.e. a partition suit in the civil court and get a stay on the property , however, if he has got the property transferred in his name then you can even pursue with a criminal case against him side by side.