"I pay tributes to our brave soldiers," Singh said in his condolence message to the bereaved families," he said.
A Lt Colonel was among the five army personnel killed yesterday when their 32-member convoy came under attack in Gurmuck in the volatile state of Jonglei, South Sudan. Four others were injured in the attack.
There are around 2,200 Indian army personnel comprising two battalions, one based in Jonglei and the other in Malakkal, Upper Nile, on the border with Sudan.
India is a major contributor to UN peacekeeping forces around the world and has suffered losses in the past.
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.