Shalmaneser III, during the 9th century BC, is very precise about the locations of the cities of Pitru and Mutkinu: "At that time, the town of Ashurutiraqbat, which the Hatti calls Pitru, which is on the Sagur River, at the other side of the Euphrates, and Mutkinu, who is on this side of the Euphrates, whom Tiglath-pileser, the father, the prince, my predecessor, took by force, and which had been invaded at the time of Ashur-rabi II, king of Assyria, by the king of Aramu - these cities I restored and I installed Assyrian officials there."
In fact, this same region is referred to, under the name of "Mitkia", at the very beginning of the annals of Ashurnasirpal II: «By the Khulun path, I entered the land of Kirkhi. I have conquered Khataru, Nistun, Irbidi, Mitkia, Arsania, Zila, Khalua, towns of the country of Kirkhi, which lie between the mountains of Usu, Arua and Arardi.»
It must be understood that the Tall Ahmar, admitted as Til-Barsip, is situated almost in front of the confluence of the Euphrates and the Sagur. Another tell that geographically corresponds is the Tall Qumluq (or Qümlük, Goumlouk).
The Tall Qumluq, of about 5 hectares, was excavated by a mixed Syrian and Japanese team, during years 1980 before the construction of a dam on the Euphrates. There they found an occupation of the end of the Bronze Age and of the Iron Age that corresponds. This site is now an island. This excavation is publish in a recent book by Youssef Kanjou and Akira Tsuneki.
My notes of veracity :
Mutkinu or Mitkia was the present tell Qümlük: 3/5