The US, the UK and Australia have issued travel advisories to their citizens in view of the bomb blast at a famous eatery frequented by foreigners in Pune, asking them to maintain a "heightened situational awareness and a low profile".

"American citizens are advised to be alert to the continued possibility of terrorist attacks in India.

"The February 13 terrorist bombing in a bakery frequented by westerners in Pune, Maharashtra, serves as a reminder that terrorists and their sympathisers are capable of attacking targets where US citizens or Westerners are known to congregate or visit," the US travel alert said.

In its travel alert, updated after the blast, the Foreign and Commonwealth Office (FCO) of the UK government said, "on 13 February a bomb exploded in a bakery/coffee shop in Pune killing nine and injuring up to 53 people. Foreigners were among the casualties.