>> Investigation launched into Len Co quarry rockslide

>> Sixteen dead in Vietnam rockslide

Police in central Nghe An province on April 4 charged the owners of Len Co quarry with "labour safety violations" following the deaths of 18 people in a rockfall last week in Yen Thanh district\'s Nam Thanh commune.

Drilling into the rock to find the remaining victims on April 2

After an initial investigation, police charged quarry owners Chin Men Co Ltd and company boss Phan Cong Chin, 47, with negligence. "Despite being warned by local authorities several times, he did not abide by labour-safety regulations," said Thai Van Binh, deputy head of the district police.

An official report by the provincial Department of Popularisation and said the quarry was being incorrectly mined.

The stone was exploited from the foot of Len Co Mountain which led to instability, the report stated.

The company was granted a licence to exploit the site five years ago by the provincial People\'s Committee.