Archaeologists from the Vietnam Institute of Archaeology, the Hanoi Museum and the Hanoi University of Social Sciences and Humanities have announced the discovery of over 70 graves from the pre-Dong Son period and 40 graves from Dong Son period at the Vuon Chuoi archaeological relic in Kim Chung commune, Hoai Duc district.

More than 6,300 artifacts, have been found in excavations at the archaeological site Ben Mau A in Van Yen district, the northern mountainous province of Yen Bai, since September 2000, according to the provincial Museum.