British Home Secretary John Reid told parliament after the release of the report that Khan and Tanweer were "likely to have met al-Qaeda figures" during their visit to Pakistan.
The details of those contacts remain unknown, although Khan was said to have received around 200 calls from Pakistan in the run-up to the attacks.
"We are still in the dark about exactly what Tanweer and Khan did when they were in Pakistan," a security official said on condition of anonymity.
In Samundari the memory of Tanweer is still as a quiet, decent young man, said Amin Badal, a former local councilor.
"He came to the village rarely. Last time he was here he did not mingle with many people. I saw him sometimes offering prayers in the village mosque," he said.
"We are personally hurt that one our boys has been portrayed as a killer," he said.
RSS