Meanwhile, sources say Deputy National Security Adviser Samuel 'Sandy' Berger warned senior Pakistani officials during a recent visit to Islamabad that Pakistan's purchase of Chinese nuclear equipment could interfere with US plans to proceed with the arms transfer. But so far, despite news reports that the transfer might be deferred, the Administration has taken no official action against Islamabad. Pakistani Ambassador to the US, Maleena Lodhi, said US officials had raised the CIA report with her government and "talked about the difficulties" of proceeding with the arms transfer at this time. However, she emphasised: "The Brown Amendment is law, and we obviously expect its early implementation."