A damning Sri Lankan parliamentary investigation has outlined extensive lapses of intelligence and coordination before the Easter Sunday bombings that killed 269 people, and concluded the spy chief was primarily to blame for the failure to stop the attacks.

The report, released on Wednesday, found the former head of the state intelligence service, Nilantha Jayawardena, had received information about possible attacks as early as 4 April, 17 days before the suicide bombings took place, but was slow to share the intelligence with relevant officials.

It said he was invited to share details of the specific warning of an impending attack at a coordination meeting of leading intelligence officials on 9 April, but Jayawardena said he would include the information in a special report he would send later. The report was not subsequently shared with most of the officials in the room, the committee found.

Read more: The Guardian (UK)