A letter titled “IS Threat”, which was sent on August 2 to the police in Negeri Semblian state, Malaysia, included a photo of the Myanmar leader.The letter also threatened Malaysia’s Prime Minister Najib Razak and his deputy Ahmad Zahid Hamidi.Zaw Htay, spokesperson for Myanmar’s president said that although Myanmar authorities have not received any official notification from Malaysian authorities, the government is analysing and investigating the credibility and reliability of the sources.Security measures for Aung San Suu Kyi are being taken seriously and Myanmar authorities will not underestimate such security threats, the spokeman said.Aung San Suu Kyi is expected to visit Malaysia at the invitation of Prime Minister Razak. A date for the visit has not been announced yet.