New Delhi, July 29 - The dossier submitted by Pakistan on the Mumbai terror attack was the first time it had 'formally briefed' India on the results of an investigation into a terror attack, Prime Minister Manmohan Singh said Wednesday and added that his government needed no lessons from the NDA.

The dossier was a 34-page document containing details of the planning and the sequence of events, photographs, a copy of the first information report (FIR) and the communication methods used, the prime minister said in parliament.

He said it also includes details of the seizures made, including literature, intelligence manuals, backpacks etc.

According to the prime minister, the dossier established 'beyond doubt' that the investigation established beyond doubt that the Lashkar-e-Taiba backed and financed the operation.