Jan 20 (Reuters) - Former Kazakh President Nursultan Nazarbayev has undergone a successful heart surgery and his life is not in danger, his spokesman Aidos Ukibay said on Friday.
Ukibay's tweet followed reports by Kazakh media that Nazarbayev, 82, had been hospitalised. (Reporting by Olzhas Auyezov; Editing by Himani Sarkar)
