The third-largest investor in Adecco, the Switzerland based temporary staff group gripped by fears of accounting irregularities and lax internal controls, has demanded that its shares and bonds be suspended until the group provides financial clarity.

DWS, the largest retail fund manager in Germany with €87.5bn ($110.6m) in assets under management and 1.64% of Adecco according to Thomson Financial, attacked the group for its lack of transparency and poor communication with investors.