Pakistan brushed aside as 'baseless speculation the accusations leveled by the US regarding the presence of Osama bin Laden and Taliban leadership including Mullah Omar in Quetta. Talking to media on Thursday, Foreign Office spokesman Abdul Basit said if there are any evidence that US has, it should hand them to Pakistan; however, he termed the US allegations in this connection as unfounded speculations. It should be mentioned here that Deputy Chief of the Mission, US Embassy Gerald M. Feierstein alleged earlier today that Osama is present in Pakistan, adding the command system of Taliban is based in Quetta and they are launching their activities from the suburbs of the city.