After the partition of India in 1947, when most excavated sites of the Indus Valley civilisation lay in territory awarded to Pakistan, the Archaeological Survey of India, its area of authority reduced, carried out large numbers of surveys and excavations along the Ghaggar-Hakra system in India. Some speculated that the Ghaggar-Hakra system might yield more sites than the Indus river basin. By 2002, over 1,000 Mature Harappan cities and settlements had been reported, of which just under a hundred had been excavated, mainly in the general region of the Indus and Ghaggar-Hakra rivers and their tributaries; however, there are only five major urban sites: Harappa, Mohenjo-daro, Dholavira, Ganeriwala and Rakhigarhi. According to a historian approximately 616 sites have been reported in India, whereas 406 sites have been reported in Pakistan. However, according to archaeologist Shereen Ratnagar, many Ghaggar-Hakra sites in India are actually those of local cultures; some sites display contact with Harappan civilization, but only a few are fully developed Harappan ones.