There was a sudden influx of Muslim refugees who escaped from communal riots in Bombay State , United Provinces and other parts of India , caused Sindhi Hindus to leave Pakistan .
However , because of insecurity in Pakistan , and most of all , a sudden influx of Muslim refugees from Gujarat , Uttar Pradesh , Bihar , Central Provinces , Hyderabad State , Rajputana ( Rajasthan ) and other parts of India , many Sindhi Hindus decided to leave Pakistan .
Sindhis in India