Foreign institutional investors (FIIs) were net sellers of Rs 172.31 crore (provisional) today, according to data released by BSE.While FIIs made gross purchases of Rs 3,887.74 crore, gross sales totalled Rs 4,060.05 crore.FIIs were net buyers of Rs 520.20 crore on Wednesday, March 28, according to data released by Sebi today. While FIIs made gross purchases of Rs 3,716.40 crore, gross sales totalled Rs 3,196.20 crore.Mutual funds (MFs) were net sellers of Rs 206.79 crore on Wednesday. MFs made purchases of Rs 483.90 crore and sales of Rs Rs 690.69 crore.