Edmonton police say they have solved the September murders of two local men, following a massive police investigation that involved dozens of officers.

The first death occurred Sept. 4, when police were called to a location in South Edmonton after reports of shots being fired on a Saturday afternoon. They found the lifeless body of 23-year-old Jesse Lee James next to a red Cadillac Escalade.

Days later, police found the remains of a young man in a field on the outskirts of the city.

The victim was later identified as Emmanuel Amoah, a 19-year-old high school student. Police have not released the cause or date of his death.

The cases did not seem related on the surface and police have not said whether the two victims knew each other. But on Monday, police announced the arrest of six suspects -- two of whom were charged in both deaths, while the remaining four were charged in connection with only one of the deaths.

In the death of Jesse Lee James, police charged two men -- 19-year-old Jason Kadeem Williams and 21-year-old Christopher Macoon-Evans -- with second-degree murder.

In the death of Emmanuel Amoah, police charged two young offenders. Both suspects in his slaying were charged with one count of second-degree murder and one count of offering an indignity to a dead body.

The two suspects charged in both killings each face two counts of second-degree murder and a count of offering an indignity to a dead body, which pertains to the Amoah death. One suspect is a young offender, the other is 19-year-old Mahamed Abdulle.

Police say up to 60 officers helped crack the case, including homicide investigators, surveillance officers, as well as members of the robbery unit and the drug and gang unit.

Edmonton police Staff Sgt. Lorne Pubantz said the complex case led to charges that are rarely laid.

"We've never charged two individuals for two separate murders at the same time," Pubantz told reporters on Monday.

The Globe and Mail reports that Amoah is originally from Ghana and one of his accused killers, Abdulle, is of Somali descent.

In recent years, members of Alberta's Somali community have drawn attention to the growing number of young Somali-Canadians being killed within the province.

A pair of advocacy groups have called for the province to create a task force to probe the deaths of the slain men from the Somali-Canadian community.

With files from CTV Edmonton's Sean Amato