A spokesman said Islamabad has taken strong exception to Dr Singh's statement and had summoned India's deputy high commissioner to the Foreign Office in this regard.
"The deputy high commissioner of India was summoned to the Foreign Office by the director general (South Asia), and told that the Indian prime minister's remarks warrant serious and prompt attention," The Daily Times quoted the spokesperson, as saying.
Dr Singh on Monday said there is credible information that terrorist groups based in Pakistan are planning to carry out fresh attacks in India and advocated the need for utmost vigilance.
He was speaking after inaugurating a Chief Ministers' Conference on Internal Security in New Delhi.
He said, "We have put in place additional measures after the last year's Mumbai terror attack. But there is need for continued vigilance. The area of operation of these terrorists today extends far beyond the confines of Jammu and Kashmir and covers all parts of our country."