Prime Minister Najib Razak's step-grandmother Puan Sri Siti Amirah was one of the 43 Malaysians who are believed to have perished when Malaysia Airlines (MAS) flight MH17 crashed in Ukraine, yesterday.<br /><br />The Star Online which quoted a family spokesperson, said, Siti was travelling alone on her way back to Jogjakarta, Indonesia from Amsterdam and intended to transit at Kuala Lumpur International Airport.