KABUL, Afghanistan — A suicide bomber struck a joint patrol of NATO and Afghan forces near a large military base just outside the Afghan capital on Sunday, killing at least three NATO service members and injuring three others, officials said, on a day that saw deadly violence across the country.

An Afghan soldier was killed in the eastern city of Jalalabad trying to stop a suicide bombing at a checkpoint, and in the south, the Taliban continued a bloody assault on the district of Chinarto, in Uruzgan Province.

Lt. Col. Martin O’Donnell, a spokesman for the coalition, said the attack on NATO troops happened in the Charikar district of Parwan Province, to the north of Kabul.

All three service members killed were from the Czech Republic, according to Lt. Gen. Ales Opata, the Czech Army’s chief of general staff. NATO said one of the wounded was American and two were Afghan.