He also requested strengthening of security at places of worship during a telephonic conversation with Clinton, who is currently in Soth Africa, official sources said.
Clinton was "receptive" to Krishna's views and assured all assistance in the matter, they said.
Krishna also conveyed his sincere appreciation for quick and brave response by local authorities in averting a worse tragedy.
"The minister hoped for a strong message of reassurance to the Indian community that everything necessary for their security nd welfare would be done," the sources said.
Condemning the incident, Krishna told reporters, "Every right thinking person has to condemn this. This is an attitude which does not fit into the proclaimed policies of the US."
Krishna said the motive and the persons responsible for the attack on the gurudwara would be revealed in the preliminary report of the investigating agency.
More From This Section
To a question on gun culture in the US, the minister said the US authorities will have to take a comprehensive look at these kinds of tendencies. However, Krishna was quick to add that India would not interfere in the internal affairs of the US.
At least one gunman was also shot dead in the attack on the gurudwara, police said.