ISLAMABAD Pakistan has multiplied efforts to arrest Hamesh Khan, the most wanted person in Bank of Punjab scam, sources told TheNation on Tuesday. It has been learnt reliably that the government is using two channels to get hold of the former banker. Firstly, it is using Interpol and secondly, it has sought help from US authorities in Washington to hand over Hamesh Khan to Pakistan. Experts are already attending to legal formalities, absolutely certain about overcoming any hitches of there being no formal extradition treaty between Pakistan and the US, well placed Foreign Office sources told TheNation on condition of anonymity. Since there exists no valid extradition treaty between the governments of Pakistan and the United States, Pakistan has made the request to US State Department on the basis of a bilateral agreement that exists between the two countries, it was learnt Tuesday. Pakistan is not in a position to mount pressure on the USA for extraditing Hamesh Khan, however, a formal request has been made to US authorities in Washington that is likely to work well, said an official of the Foreign Office when contacted. A team comprising officials of NAB, FIA and Pakistan Embassy in Washington has been dispatched to US and is busy in negotiation with higher officials of US State Department regarding arrest of Hamesh Khan.