Kabul, Afghanistan (CNN) -- Four people were killed in Afghanistan's southern Uruzgan province Friday when a civilian vehicle hit a roadside bomb, according to the country's Interior Ministry.
One person was injured in the incident, which occurred near the provincial capital of Tarin Kowt.
The attack was quickly condemned by Afghan President Hamid Karzai and Gen. John R. Allen, commander of NATO's International Security Assistance Force (ISAF).
Allen, in a written statement, called the incident "another cowardly insurgent attack."
Roadside bombs -- used primarily to target ISAF forces -- are a frequent cause of Afghan civilian casualties.