Bruce Trigger states that Brahmi likely emerged from the Aramaic script but with extensive local development but there is no evidence of a direct common source.[17] According to Trigger, Brahmi was in use before the Ashoka pillars, at least by 4th or 5th century BCE in Sri Lanka and India, while Kharoṣṭhī was used only in northwest South Asia (eastern parts of modern Afghanistan and neighboring regions of Pakistan) for a while before it died out in ancient times.[17] According to Salomon, the evidence of Kharosthi script's use is found primarily in Buddhist records and those of Indo-Greek, Indo-Scythian, Indo-Parthian and Kushana dynasty era.