Colombia ? The Colombian Defense Ministry said Saturday it believes the legendary leader of Latin America’s largest guerrilla army is dead.

Manuel “Sureshot” Marulanda, commander of the Revolutionary Armed Forces of Colombia, or FARC, died on March 26, the ministry said in a statement, citing “different military intelligence means.”

“We know that inside the FARC, the version is that he died of natural causes, specifically from a heart attack,” the ministry said. “Whether the death of Marulanda came in a bombardment or from natural causes, this would be the most serious blow this terrorist group has suffered.”