Troubled Canadian cannabis company CannTrust Holdings Inc. ctst ca:trst said Monday it has received a report from Health Canada informing it that its manufacturing facility in Vaughan, Ontario is non-compliant with certain regulations, sending its battered stock down 28% in premarket trade. The company, which is already in trouble with the regulator over unlicensed growing at a facility in Pelham, Ontario, said Health Canada found during a July 10 to 16 inspection that the Vaughan facility was using rooms converted from operational areas to storage areas since June 2018 without permission; it had constructed two new areas without prior approval, one of which was used to store cannabis; had inadequate security controls at the facility; had inadequate quality assurance investigations and controls; was using standard operating procedures that did not meet requirements under regulations; and was not retaining documents or information in a manner that would allow the regulator to complete its audit in a timely manner. "As previously announced, the Company implemented a voluntary hold on the sale and shipment of all cannabis products while Health Canada reviewed its Vaughan, Ontario manufacturing facility," the company said in a statement. "CannTrust continues to work closely with Health Canada and will provide further details of the hold and other developments as they become available." The company also said it has prepaid a C$13.3 million ($10 million) mortgage to Meridian Credit Union, which was secured by the Pelham facility. Health Canada seized five metric tons of the company's cannabis from that facility in July, when it discovered the illegal grow rooms. Shares have been hammered since then, after media reports found top management knew about the illegal growing and that some of thatcannabis had been exported to Denmark, a breach of Canadian drug laws. Shares are down 47% in the last three months, while the ETFMG Alternative Harvest ETF MJ, +0.48% has fallen 17% and the S&P 500 SPX, +1.59% has gained 1.3%.