City officials have ordered the immediate closure of three illegal buildings inside Don Muang New Market, adding more charges to those concerning the sale of substandard skincare and supplementary food products.
A police-led raid on the market, located just across from Don Mueang Airport, last Saturday dragged some sellers into the food and drug scandal.
Those behind the market also face charges in relation to building offences and other irregularities including the venue's alleged connection with influential figures.
Don Muang District Office chief Wandee Sonchai said Wednesday she issued an order covering prohibitions in terms of building usage and demolition after finding at least three buildings that appear to have violated the 1999 Building Control Act.
One encroached on a public area near Prem Prachakorn canal while another two, with metal structures put up over part of a nearby road, were built without permission, she said.
Several more buildings are believed to have been adapted or renovated without approval and they also will face legal action, Ms Wandee added.
The wrongdoings emerged after police and officials from the Food and Drug Administration (FDA) searched the market on Saturday and found illegal and second-rate cosmetics and food supplements in 12 locations.
According to investigators, many products belonged to Magic Skin Co, which is currently facing a probe.
Deputy Prime Minister Prawit Wongsuwon said Wednesday police must also check whether a former police officer, Pol Lt Col Santhana Prayoonrat, who serves as an adviser to the market, played any role in this.
The suspect previously worked as deputy superintendent at the Special Branch Police Division.
Pol Lt Col Santhana claimed to know many important people and accused a "minister with a military rank" of being behind the market raid.
"Did he mean that minister is me?" Gen Prawit said.
"Why would I need to have made such an order?" The case is being handled by police and the FDA, he said.
Gen Prawit played down a report that Pol Lt Col Santhana called national police chief Pol Gen Chakthip Chaijinda in relation to graft. Pol Lt Col Santhana appeared at the state complaint centre near Government House Wednesday to send Prime Minister Prayut Chan-o-cha "secret documents" alleging corruption involving senior government figures.