Leaving home during lockdown to buy groceries

I am resident of Chennai and left home to buy daily supplies and vegetables on 1st April. However, while returning back, Police put barricades on the road and caught hold of more than 100 people seeking information about address, age, vehicle and phone number, identity etc. Further my identity card was seized along with many others and we were asked to collect the same from near by Police Station. On going to collect the Id card the next day, I was informed that some case will be charged against us and summon shall be sent from Court. In this regard, I seek solution regarding the following matters: 1. I had the bill of groceries that I purchased which has time stamp on it and I tried to convey them that I left home to buy daily supplies only which is permitted during morning 6 am to 2.30 pm. 2. I was alone (not accompanied by anyone else from family) and was wearing proper N95 mask. 3. I did not resist or tried to obstruct any actions of Police personnel. So, what could be the matter for charging case against me and what could be the remedy if such summon is received? Also, can the grocery bill be sufficient to prove that I went out only to buy daily supplies and can or shall there be any other requirement to prove my purpose. Quick reply in this regard shall be highly appreciated.