Simon Property Group Inc. refused its rival General Growth Properties Inc. for discussions because it wanted to impose the Simon's $10 billion bid for the No. 2 U. S. mall owner.

“Comments on the proposed offer are not constructive and make clear your apparent interest in precluding our offer from moving forward or being considered by your stakeholders", wrote David Simon, CEO of the Simon Property Group in a letter to the General growth CEO Adam Metz on Friday.

Simon made its offer public on Tuesday. General Growth said that it is looking into a possible sale of the company and also informed Simon that its offer wasn't convincing enough to turn it from its plan to come out from bankruptcy and search other potential offers. It has invited Simon to be the part of that process. General Growth Properties hadn’t commented on the letter yet, sent Friday.

Simon Property shares closed up 0.7% at $77.72 and General Growth closed up 0.4% at $12.74.