The Prime Minister's Office has denied reports that Prime Minister Manmohan Singh had conveyed his unhappiness to External Affairs Minister S M Krishna over his criticism of Home Secretary G K Pillai for his statement made on the eve of Indo-Pak dialogue. The PMO spokesman said in a statement that the reports in a newspaper in this connection were false and mischievous reports. Dr.Singh is understood to have taken up with Mr.Krishna his public criticism of Home Secretary Pillay's remarks on the involvement of ISI in the 26-11 Mumbai attack. Mr. Pillai's remarks had come ahead of Mr. Krishna's meeting with his Pakistani counterpart Shah Mehmood Qureshi in Islamabad earlier this month.