Following recent archaeological findings, the Bannu basin has become the favoured choice. David Fleming points out that it is close to Kurram and Tochi rivers and it has four routes to the west, via the Khyber Pass, the Kurram river valley, the Gomal Pass and the Bolan Pass in Balochistan. Magee et al. have reported findings of recent archaeological excavations at Akra, noting that it was a large urban site that existed throughout the Iron Age and had trade relations with Central Asia.