Manmohan Singh

India's prime minister said Tuesday his government had credible evidence of Pakistan's involvement in the July 11 train bomb blasts in Mumbai, formerly known as Bombay.

Manmohan Singh's remark came after India's top security official said on Sunday New Delhi had good, but not conclusive evidence that Pakistan's spy agency was involved in the bombings.

National Security Adviser M.K. Narayanan's statement prompted the opposition Bharatiya Janata Party to accuse the government of wavering on the issue.

Pakistan has consistently denied any involvement in the attacks that killed 186 people and called India's accusation propaganda.

India has said it will present the evidence during a meeting between the foreign secretaries of India and Pakistan in November.

Last month, Indian police blamed Pakistan's Inter-Services Intelligence and the Lashkar-e-Toiba militant group for the seven bombs that ripped through commuter trains and platforms in Mumbai.

Some information for this report was provided by AP.