Azerbaijan’s leader on Monday accused Moscow of carrying out a “cover up” over a passenger jet crash last month that claimed 38 lives, as relations sour between the two neighbors.

SAO PAULO (Reuters) - The extraction of flight data from the Brazilian-made Azerbaijan Airlines plane that crashed in Kazakhstan last month was completed at a lab run by Brazil's air force, according to a statement released by the entity on Monday. The data from the Embraer plane was sent to the Kazakhstan authority investigating the crash.

The Brazilian Air Force Laboratory has sent data from the flight recorders of an Azerbaijan Airlines plane to Kazakh investigators. The plane crashed on December 25 near the city of Aktau, Radio Liberty reports.

The black box from the Azerbaijan Airlines crash in Kazakhstan, believed to have been caused by a Russian missile, is being sent to Brazil for investigation, Kazakh authorities reported on Dec. 29. Kazakhstan’s decision aligns with Azerbaijan's call for a transparent probe into the crash,

Azerbaijan Airlines flight J2-8243 from Baku ... crash would become known after the data from flight recorders sent to Brazil is accessed.

In the crash’s aftermath, Azerbaijan has unleashed rare and stinging criticism of Russia, with the country’s president saying Moscow’s response has caused “surprise, regret and rightful indignation.”

Kazakhstan's government told Euronews that it has decided to send the downed Azerbaijan Airlines flight recorders to Brazil for the full and transparent disclosure of the tragedy.View on euronews

Photos provided by Azerbaijani media outlet AnewZ show that the Azerbaijan Airlines plane which crashed near Aktau in Kazakhstan has signs of damage consistent with an attack from outside the aircraft.

Brazil Assisting Kazakhstan In Probe Of Downed Azerbaijan Airlines E190 is published in Aerospace Daily & Defense Report, an Aviation Week Intelligence Network (AWIN) Market Briefing and is included with your AWIN membership.

Azerbaijani, Russia, Kazakhstan and Brazil are currently working together to investigate a horrific recent plane crash.