Louisville Metro Police have arrested two additional teenagers in connection with the shooting death of a 30-year-old man in the Cherokee Triangle neighborhood.

The suspects, both 15 years old, were taken into custody Thursday, according to a statement from LMPD spokeswoman Alicia Smiley.

Jason Spencer, a Humana employee and creator of the Louisville Humor Twitter account, was killed Sunday night while walking with his wife in the Cherokee Triangle neighborhood.

Police spokesman Dwight Mitchell said Thursday it was a "botched robbery attempt."

More:Police to increase patrols in the Highlands after death in Cherokee Triangle

Background:Humana employee killed in Cherokee Triangle shooting, teen arrested

The first suspect, another 15-year-old boy, was found shot later Sunday near the intersection of 11th and Hill streets in the Park Hill neighborhood. A police statement on Tuesday said Spencer had a gun and returned fire at the suspects.

Police did not immediately respond Thursday to requests for information on the injured 15-year-old suspects' charges or whether there were other outstanding suspects.

The condition of the shot suspect has not been confirmed.

The homicide prompted alarm from neighbors, leading to more police patrols in the Highlands neighborhood, according to a newsletter from the district's councilman.

"Murder and violent gun crime in the Highlands are rare, so, naturally, District 8 is shocked, saddened and scared right now," Councilman Brandon Coan said in a newsletter to constituents Tuesday night.

This year, there have been 99 homicides in Jefferson County. Last year, LMPD handled 118 criminal homicides investigations, the most in its 14-year history.

Spencer's death marked the first murder in Coan's District 8 since December 2015 and the seventh since 2011, according to Coan.

The police response after a homicide varies by neighborhood, said John Bradley, LMPD's public information commander.

"In essence, it is up to the division commander to take a look at it and formulate a plan," Bradley said. "The standard part is that the division commander is confronted with a homicide in his division and looks at the factors and decides what resources to place in different areas."

LMPD's Fifth Division, where Coan's District 8 is located, has the lowest total combined crime (violent and property) and calls for service of all eight LMPD divisions.

"I think the difference is that Councilman Coan's area has not traditionally had the kind of violence that my area experiences on a regular basis," said Councilman David James, whose District 6 includes neighborhoods such as Algonquin, California, Shelby Park and Smoketown. "So he is experiencing what me and some of my other council members experience daily and weekly."

Reach Reporter Thomas Novelly at 502-582-4465 or by email at tnovelly@courier-journal.com. Follow him on twitter @TomNovelly. Reporter Darcy Costello contributed to this story.