The commander of the North Atlantic Treaty Organisation mission to Afghanistan US General Scott Miller was in a meeting with the Afghan officials moments before the attack but was unharmed.
It wasn't immediately clear how many North Atlantic Treaty Organisation troops were wounded.
Miller had been attending a high-level security meeting with security officials ahead of parliamentary elections on Saturday.
A senior security official said the governor's bodyguard opened fire and hit Razeq in the back as soon as officials came out of the meeting.
"Teachers and students of educational institutes must stay away from all enemy political processes and must not allow the invaders and their stooges to utilize their schools for the implementation of their evil projects", the Taliban said in a statement.
In addition to Kandahar police chief Gen. Abdul Raziq's death, the local leader of the country's main intelligence agency and a journalist were killed, Datyagiri said. "Three American's were wounded, have been medically evacuated and are stable". A spokesperson for the provincial governor Omar Zwak said that "explosives were placed inside his [Qahraman's] sofa", reported Tolo News.
An election candidate was among four persons killed in a bomb explosion at his office in Afghanistan's Helmand province on Wednesday, reported Reuters. "We are being told the area is secure". "He was seen as crucial to the security of Kandahar, the birthplace of the Taliban where the group continued to have a presence". Two Americans were injured in the incident at the compound, a North Atlantic Treaty Organisation spokesperson said, and a local cameraman was reportedly killed. "Initial reports also say the attacker is dead". Ahmadi asserted that Miller had been killed, a claim denied by USA military officials. He had been credited with security improvements in recent years.
Sources told TOLO News that Raziq was killed when assailants struck the US and Afghan group after a high-profile meeting at the governor's office.
Another witness said the city was "full of military forces".
Earlier Wednesday, a parliamentary candidate in southern Helmand province was killed when a bomb exploded while he was holding a meeting in the courtyard of his campaign headquarters in the provincial capital, Lashkar Gah.
Afghan policemen stand guard at a checkpoint ahead of parliamentary election in Kandahar on October 18, 2018.