Minister of State for External Affairs Preneet Kaur told a television channel that India's Ambassador Nirupama Rao had sent a special officer to Wisconsin.
A gunman opened fire in a Sikh gurdwara in Oak Creek of Wisconsin, south of Milwaukee, killing seven people.
The minister also said the security of gurdwaras and other religious places of communities in the US should be taken care of.
"It is a very shocking and tragic incident that has taken place, which is deplorable," said Preneet Kaur.
"We have been in touch with the government and our ambassador there Nirupama Rao has sent a special officer from Washington to Wisconsin, and also the consul general in Chicago is taking care," she added.
Preneet Kaur also said the US has assured full investigation of the incident.
"The American government has reached out and we are in touch with the law officers there. We hope that the perpetrators would be brought to book," she added.