Bhandara police chief Aarti Singh told the BBC that the motive behind the crime was not yet known.

BBC: India holds three for rape and murder of sisters

The bodies of the girls, aged six to 11, were found on 16 February in their village well in Bhandara district.

BBC: India parliament uproar over rape and murder of sisters

Their bodies were found two days later in a well in their village in Bhandara district, 200km (124 miles) from Mumbai, police said.

BBC: India holds three for rape and murder of sisters