How did Adani Green moved up 9% even before the BSE Corp. Announcement? Insider Trading??

I have noticed that Adani Green Rajasthan deal of 250 MW. Solar plant was announced on BSE at 11:28 AM and on NSE at 11:31 AM. So how did Adani Green shares surged one hour before the announcement i.e. at 10:30 AM itself and that too with such huge volumes? Is there anything else that I have missed? Can anyone explain please? TY