SITTARD - The Dutch Competition Authority (NMa) suspects five Limburg construction companies of making prohibited price agreements. A spokeswoman for the NMa confirmed this yesterday. One of the suspected contractors would be Janssen De Jong Infra, the company that also plays a crucial role in the corruption affair that the prosecution is now investigating. Which four other companies are suspected is not yet known. Justice suspects three employees and a former employee of Janssen de Jong of bribing seven officials. They allegedly bribed employees of the province and several municipalities in exchange for sensitive information about construction projects with cars and trips, among other things. Stein official David G. was arrested on suspicion of corruption in a project in Voerendaal.