US President Barack Obama phoned India's Prime Minister Manmohan Singh Thursday to condemn the deadly bombing in the southern city of Pune that killed 11 people, officials said, DPA reported.
An Italian woman and an Iranian student were among those killed by Saturday's blast at a popular bakery that also left 60 injured.
Obama called Singh early Thursday to "condemn the blast and to condole the loss of lives," a statement by the Indian government said.
"In a brief conversation, the two leaders took the opportunity to review developments in Indo-US relations," it added.
US envoy to India Timothy Roemer earlier said that Washington stood with New Delhi in fighting terrorism.
Meanwhile, authorities in Pune said another victim, a student, died Wednesday, raising the death toll to 11.
On Wednesday, a previously unknown splinter group of Pakistan-based Lashkar-e-Taiba claimed responsibility for the bombing, but Indian investigators dismissed Lashkar-e-Taiba al-Almi's claims.
"We have verified all the relevant details. It (the claim) has no value," a security official told the Times of India newspaper.
"It could be a red herring to distract attention from the actual perpetrators," the official added.
Indian media said investigators suspect the involvement of the LeT and a home-grown militant group, Indian Mujahideen.
The bombing was the first major attack in India since the 2008 carnage in financial hub Mumbai in which 166 people were killed by 10 LeT militants.
Obama condemns latest India bomb attack in phone call to premier
