Dilmun was mentioned in two letters dated to the reign of Burna-Buriash II (c. 1370 BC) recovered from Nippur, during the Kassite dynasty of Babylon. These letters were from a provincial official, Ilī-ippašra, in Dilmun to his friend Enlil-kidinni in Mesopotamia. The names referred to are Akkadian. These letters and other documents, hint at an administrative relationship between Dilmun and Babylon at that time. Following the collapse of the Kassite dynasty, Mesopotamian documents make no mention of Dilmun with the exception of Assyrian inscriptions dated to 1250 BC which proclaimed the Assyrian king to be king of Dilmun and Meluhha. Assyrian inscriptions recorded tribute from Dilmun. There are other Assyrian inscriptions during the first millennium BC indicating Assyrian sovereignty over Dilmun. Dilmun was also later on controlled by the Kassite dynasty in Mesopotamia.