India PM may be admitted to hospital
"It has to be seen what is needed, whether bypass surgery or angioplasty. The doctors are looking at all options," an official at the prime minister's office told Reuters.
A doctor at the All India Institute of Medical Sciences also told Reuters Thursday blockages were discovered and a second cardiac bypass surgery could be an option.
Foreign Minister Pranab Mukherjee could take over prime ministerial responsibilities while Singh was recovering from any surgery, a foreign ministry official said.
(Reporting by Krittivas Mukherjee; Editing by Alistair Scrutton)