Federal agents are being embedded into Prince George's County homicide units in response to a string of homicides in the county that has left 13 people dead so far this year.

Police said Thursday that agents from the FBI, Drug Enforcement Administration and Bureau of Alcohol, Tobacco, Firearms and Explosives began working with the county's homicide squads this week.

Cpl. Larry Johnson, a Prince George's County police spokesman, said he didn't know how many federal officers are involved in the initiative. He said the officers are slated to continue working with county authorities "until there's some sort of normalcy."

About 135 officers from other local agencies -- including from the Maryland State Police, Mount Ranier police and Bladensburg police -- are also working with Prince George's units to beef up patrols, police said.

The additional federal and local officers are deployed to areas where the homicides have occurred this year: Oxon Hill, Suitland, Hillcrest Heights, Capitol Heights, Forestville, Langley Park and Adelphi.

"We will stop this unacceptably high level of violence that has plagued our inner Beltway communities," Chief Mark Magaw said in a statement.