MUMBAI: The Reserve Bank of India (RBI) likely  sold dollars through state-owned banks in a bid to prevent sharper falls  in the Indian rupee after reports of explosions at the Brussels airport  hit global markets, three currency traders said on Tuesday. The traders  added the intervention started when the Indian rupee fell to around  66.83 per dollar levels, down from its 66.5250/66.5350 close on Monday.  The Indian rupee was trading at 66.7450/7525 to the dollar at 0902 GMT.  Explosions tore through the departure hall of Brussels airport on  Tuesday morning, and a  second blast struck a metro station in the capital shortly afterwards.