Dispur, Apr 23 : Prime Minister Manmohan Singh and his wife Gursharan Kaur on Thursday cast their votes here during the second phase of the general elections.

Authorities beefed up security at Booth number 156 located at the Dispur Government Higher Secondary School at Sarumatoria, where Dr. Singh and his wife reached to cast their votes.

Singh is officially a voter from Guwahati.

A powerful bomb blast in a crowded parking area killed four people in Guwahati in the first week of April, ahead of Singh''s visit to the state.

To create awareness regarding the benefits of early detection of cancer, PM’s wife Gursharan Kaur, US Ambassador David C Mulford and his wife and CPI(M) leader Brinda Karat together with many others participated in a walk in New Delhi on Sunday.

While flagging off the “Walk for Life” organised by CanSupport, an NGO providing palliative care to cancer patients, Mrs. Singh said, “Cancer detected in early stages can be cured and cancer patients need the emotional support of their friend and family in the fight against it.”