But Gen. Austin "Scott" Miller, the target of the attack claimed by the Taliban, escaped unharmed, they said.
Two American troops were also wounded in the shooting.
The shooting broke out at the end of a meeting between Miller and officials who had been discussing how to maintain security during Afghanistan's parliamentary elections, scheduled for Saturday.More news: Australia mulling embassy move to Jerusalem: PM
USA military officials confirmed that a US soldier, a contractor and another civilian were wounded in the attack, which occurred shortly after a high-level meeting attended by Miller. Taliban spokesman Zabihulla Mujahid said over social media that an "infiltrator" opened fire inside the governor's house during a meeting.
"Provincial officials including the governor, the police chief and other officials were accompanying the foreign guests to the plane when the gunshots happened", said Said Jan Khakrezwal, the head of the provincial council, according to Reuters.
Afghan and global security officials said Gen Raziq had been shot in the back as he left the meeting and died from his wounds.More news: Red Sox bash host Astros to capture Game 3 of the ALCS
Six of Raziq's bodyguards and two intelligence officers also were wounded in the attack that was carried out by one of the governor's security personnel, the official said. "We are being told the area is secure". "2 Americans wounded. Gen. Miller uninjured, attacker reportedly dead", Operation Resolute Support, the NATO-led mission in Afghanistan, said in a tweet. "He was seen as crucial to the security of Kandahar, the birthplace of the Taliban where the group continued to have a presence". There are also reports that the region's provincial governor, Zalmay Wesa, has died of wounds suffered in the attack; Dastageri would neither confirm nor deny those reports to NPR.
The attack comes a day after a parliamentarian candidate and another key anti-Taliban figure from the Helmand province was killed in his campaign office. Gen. Harold J. Greene was killed and about a dozen US soldiers were wounded when an Afghan soldier opened fire inside a building in Kabul.
Afghanistan is tense ahead of the October 20 legislative election after the Taliban pledged to attack the ballot.More news: UEFA Nations League Report: France v Germany 16 October 2018
President Mohammad Ashraf Ghani reacted to the bombing of parliamentary candidate Abdul Jabar Qahraman's office in Lashkargah city the capital of Helmand province.