Pakistan says it will build a natural gas pipeline from Iran on its own if India refuses to join the project, which is opposed by the United States.
Foreign ministry spokesman Muhammad Naeem Khan said Pakistan would welcome India's participation but is also ready to go it alone.
Mr. Khan was responding to remarks by Indian Prime Minister Manmohan Singh, who said the proposed 2,600-kilometer pipeline project is fraught with risks.
Mr. Singh told the Washington Post last week that he is "realistic enough to realize that there are many risks" associated with the pipeline "considering all the uncertainties of the situation in Iran."
Washington accuses Iran of supporting terrorism and trying to build a nuclear bomb.