"I am not familiar with all facts of this case. I have seen in newspapers," Singh told reporters while returning home after his 7-day trip to Japan, Malaysia and Vietnam.
"When I go back I will find out the facts. Only then I will be able to make any meaningful comment," he said.
The Prime Minister was responding to a question about the Adarsh Housing Society scam in Mumbai and the offer by Chavan to step down after reports emerged that three of his family members were alloted flats in the society.
Earlier in the day, Chavan met Congress chief Sonia Gandhi in New Delhi and offered to resign and that he has left the decision to her.
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