Commodity trader Noble Group on Friday requested for a trading halt pending the release of an announcement.
The company did not diclose the details of the announcement.
Vitol Group's negotiations to buy Noble Group's oil trading unit are "very complicated" and may not end in a deal, the chief executive officer of Vitol told Bloomberg on October 18.
The sale of the oil business is crucial to the survival of Noble Group as it struggles to pay back about $1 billion of debt under its secured credit facilities.
Noble Group in July said it will sell its North American Gas & Power (NAGP) business to rival Mercuria.
Shares in the company were down 2.6 percent at S$0.38 on the Singapore Exchange prior to the halt.