Search teams on Friday recovered both the black boxes — the cockpit voice recorder and the flight data recorder — from EgyptAir flight MS804 that had crashed into the Mediterranean Sea last month killing all 66 people on board, according to reports. 

The Egyptian team investigating the plane crash have found the second black box from the Mediterranean Sea, the Associated Press said in a tweet.

The AP had earlier reported that Egyptian investigators had begun examining the cockpit voice recorder that had been retrieved first.

Reuters quoted the investigation committee of Egypt as saying that a vessel owned by Deep Ocean Search, a Mauritius-based company, was forced to retrieve the box in stages because it was greatly damaged. However, the memory unit, which is "considered the most important part of the recording device," has been recovered.

The public prosecutor in Egypt has ordered that the retrieved black boxes be submitted for analysis to the investigators of the Egyptian air accident.

Reuters on Monday quoted Egyptian investigators as saying that radar imagery provided by the Egyptian military had established that the plane had initially swerved to the left, and then spun 360 degrees to the right before going off radar.

The possibility of a terror attack or any such explanation behind the crash cannot be ruled out, Reuters quoted investigators as saying.