Hussain Haqqani, Pakistan’s ambassador to the US, left for Islamabad on Saturday after an explanation was sought from him over a secret memo to Washington claiming that President Asif Ali Zardari had feared a military coup. Haqqani wrote on Twitter: “On way to motherland. #Pakistan”. Pakistani businessman Mansoor Ijaz alleged in a column in the Financial Times last month that a senior Pakistani diplomat asked for help in getting a message from Zardari to then chairman of the US Joint Chiefs of Staff Mike Mullen. Ijaz alleged that Zardari feared a military takeover following the US raid that killed Osama bin Laden in Pakistan in May and brought unprecedented public scrutiny on Pakistani leaders. Earlier, Prime Minister Yousaf Raza Gilani said he had sought an explanation from Haqqani over the secret memo. Before flying to Pakistani, Haqqani held a sitting with US Special Envoy to Afghanistan and Pakistan Marc Grossman on Friday and discussed the changing political scenario in Pakistan. The media quoted sources as saying that meeting lasted for more than 30 minutes and the two discussed regional issues, specially the situation in Pakistan and Afghanistan. Earlier, the US State Department said the Haqqani-related media