Foreign institutional investors (FIIs) were net buyers of Rs 697.96 crore (provisional) on Tuesday, according to data released by BSE.While FIIs made gross purchases of Rs 2,172.71 crore, gross sales totalled Rs 1,474.75 crore.FIIs were net buyers of Rs 324.20 crore on Monday, May 28, according to data released by Sebi on Tuesday. While FIIs made gross purchases of Rs 1,895.30 crore, gross sales totalled Rs 1,571.10 crore.Mutual funds (MFs) were net buyers of Rs 153.30 crore on Monday. MFs made purchases of Rs 870.60 crore and sales of Rs 717.30 crore.