Kabul, Afghanistan (CNN) — A man in an Afghan military uniform killed three U.S. troops Friday in southern Afghanistan, the latest in a series of assaults against NATO soldiers by Afghans clad in security force garb.
One of the slain soldiers was Army Command Sgt. Maj. Kevin J. Griffin, who was from Laramie, Wyo. and based in Fort Caron, Colo. He was the senior enlisted soldier of the 4th Brigade Combat Team, 4th Infantry Division.
The 45-year-old Griffin joined the Army in 1988 and participated in the U.S.-led invasion of Iraq in 2003, according to his service records. He deployed twice more to Iraq, once in 2007 and again in 2009. He deployed to Afghanistan in March with a headquarters company of the brigade.
Army Maj. Thomas E. Kennedy, 35, of West Point, New York, and Air Force Maj. Walter D. Gray, 38, of Conyers, Georgia, also lost their lives in the attack.
Kennedy served on the brigade staff, while Gray was a flight commander attached as a liaison to the brigade, according to their respective service records.
An Afghan interpreter was also killed, the State Department said.
Troops were also wounded in the attack, said Maj. Martyn Crighton, a NATO spokesman. He would not release the number of injured but said “all the seriously wounded were evacuated to Germany.”
The shooter opened fire on the troops in the volatile Helmand province, said Maj. Lori Hodge, a spokeswoman for the International Assistance Security Force. Hodge did not immediately provide details about the attack, one of a handful in recent weeks to target NATO troops.
In the strikes, known as “green-on-blue” attacks, Afghan security forces or militants dressed as local police or soldiers target coalition troops.
Coalition forces have been working to address the problem. Gen. John Allen, commander of the NATO-led force, has said “an erosion of trust” has emerged from the attacks. Speaking in March, he said that the systems the Afghans and coalition had put in place to help prevent these attacks were having an effect.
Allen said coalition officials were working on a new procedure to check the backgrounds of Afghans who sign up for the army or police force, and the Afghans “have taken a lot of steps themselves.”
Elsewhere in Helmand, a vehicle struck a roadside mine, killing six civilians and wounding five others, President Hamid Karzai’s office said. Women and children were among the casualties in the bombing, which Karzai condemned.
Also, a NATO soldier was killed in an insurgent attack in the south. Details, including the precise location, were not released. Officials said the soldier was not an American.
High-profile insurgent attacks against NATO and Afghan targets persist as the United States reduces its troop strength ahead of an anticipated 2014 handover of responsibility to Afghan forces.
A deadly strike Wednesday in Kunar province left five people dead — USAID Foreign Service Officer Ragaei Abdelfattah, three ISAF service members and an Afghan civilian — and injured a State Department Foreign Service officer.
The Department of Defense said that the three American troops died “of wounds suffered when they encountered an insurgent who detonated a suicide vest.” Violence has raged during the Afghan war in Kunar province, on the border with Pakistan.
“On behalf of President Obama and the American people, I have sent my deepest condolences to Ragaei’s family and to the entire U.S. Mission in Afghanistan,” U.S. Secretary of State Hillary Clinton said in a written statement released late Thursday.
The Taliban claimed responsibility for the attack, saying two bombers targeted the American soldier near the entrance of the compound of the province council in Asadabad, according to a statement released by spokesman Zabiullah Mujahid.
Mujahid said the attack occurred as the troops were exiting a military vehicle and gathering to enter the compound. The Taliban claimed to have killed 17 soldiers, though the group is known to routinely claim responsibility for attacks and inflate casualty numbers.