A homicide car bomber attacked a group of international troops in southern Afghanistan on Monday, killing three NATO troops and four Afghans, officials said.

Two Danish troops, a Czech special forces soldier and an Afghan translator were killed in the attack in the Gereshk district of Helmand province. NATO said four other soldiers were wounded.

Provincial police Chief Mohammad Hussein Andiwal said the homicide car bomb killed three Afghan civilians and wounded seven others.

A member of Czech army's special forces was also killed in the blast, the Czech army said.

Maj. Gen. Poul Kiaerskou, head of the Danish Army Operational Command, said the troops were patrolling in Gereshk with their unit and had just arrived at a bazaar before the attack.

"It is incredibly tragic that our fight for peace and democracy again should cost human lives," said Pia Kjaersgaard, leader of the nationalist and populist Danish People's Party, which is a key government ally.

Danish Prime Minister Anders Fogh Rasmussen said Denmark had no plans to pull out from Afghanistan.

"A stable Afghanistan is also important for our safety here in Denmark," Fogh Rasmussen said in a statement. "The Danish government will continue to support the efforts to create stability and progress in the country."

It was the first time that Danes have been killed in a homicide attack in Afghanistan. Denmark has 600 troops in Afghanistan serving under NATO's International Security Assistance Force.

A Danish soldier was wounded while on a patrol Sunday in the same region when the soldier's unit was attacked with handguns and rockets, the army said.

Militants set off 160 homicide bomb attacks in Afghanistan last year, a record number, according to the United Nations. More than 8,000 people died from insurgency-related violence, the U.N. reported.