Boston Marathon Bomber Tamerlan Tsarnaev — DEATH PHOTO SURFACES

Exclusive 0419-boston-suspect-Tamerlan-Tsarnaev-gettyA gruesome death photo of the Boston Marathon bombing suspect Tamerlan Tsarnaev has surfaced online … and law enforcement sources tell our sources it”s 100% authentic.

The photo first appeared on Reddit moments ago … posted by someone who claims the photo was obtained by a “friend” who works downtown.

The picture shows the lifeless corpse of 26-year-old Tamerlan laying on a table.

The body has multiple bullet wounds … as well as a gigantic gash along his chest rib cage area.

The body is covered in blood … especially in the facial region.

In the death photo, Tamerlan”s mouth and eyes are open wide.

Law enforcement sources tell our sources … the photo is authentic. One source tells us officials are investigating to find out who leaked the picture.

Tamerlan was killed in a shootout with police in Watertown, Massachusetts early this morning. His 19-year-old brother Dzhokhar is on the run.

Both are suspects in the Boston Marathon bombing that killed 3 people and injured nearly 200 more.