No such report by UN... According to data produced by the Bangladeshi Ministry of Home Affairs, as many as 5 lakh Indians were staying in Bangladesh illegally in 2009.. Accorrding to Indian ministry illegel bengalis in India is 20million...As always the respective governments will give exagerated figures the Indian's in Bengladesh may be less than 5 lakh....
I have changed that it was BD Home Ministry after researching it a little
It is ridiculous to think that there are 20 million Bangladeshi's in India as otherwise every family would know someone
close that has migrated.
Half a million illegal Indians in BD is believable though.