Official clay seals, six actually, were found by a Mississippi State University archaeological team in Israel and the claim is that they offer evidence that supports the existence of biblical kings David and Solomon.
Whereas the reality that David and Solomon were historical figures is disputed and that no kingdom they established existed as recorded in the Bible narrative, these new finds
provide evidence that some type of government activity was conducted there in that period
The details are that Jimmy Hardin from MSU discovered clay bullae at Khirbet Summeily, east of Gaza and in the December 2014 issue of Near Eastern Archaeology published his preliminary results which indicate that
...this site is integrated into a political entity that is typified by elite activities, suggesting that a state was already being formed in the 10th century B.C. We are very positive that these bullae are associated with the Iron Age IIA, which we date to the 10th century B.C., and which lends general support to the historical veracity of David and Solomon as recorded in the Hebrew biblical texts...Some text scholars and archaeologists have dismissed the historic reliability of the biblical text surrounding kings David and Solomon, such as recorded in the Bible in the books of Kings and Second Samuel, which scholars often date to the Iron Age IIA or 10th century B.C. The fact that these bullae came off of sealed written documents shows that this site -- located out on the periphery of pretty much everything -- is integrated at a level far beyond subsistence...
...We believe that the aggregate material culture remains that have been discovered at Summeily demonstrate a level of political-economic activity that has not been suspected recently for the late Iron Age I and early Iron Age IIA...when taken together, these reflect a greater political complexity and integration across the transitional Iron I/IIA landscape than has been appreciated recently, as scholars have tended to dismiss trends toward political complexity (e.g., state formation) occurring prior to the arrival of the Assyrians in the region in the later eighth century b.c.e."
But where were the "Palestinians'?