Prime Minister Syed Yousuf Raza Gilani on Sunday refused to comment on US national, Raymond Daviss case, who is alleged of killing two Pakistanis, saying that the Punjab government is investigating the issue and nothing could be said until the report comes. Talking to media, the PM rubbishes the notion that the federal government is doing nothing over the issue; the matter is subjudice in the court thus I wont said anything in this regard, he maintained.