KANDAHAR, Afghanistan: A powerful Afghan police chief and a journalist were among at least three people killed on Thursday when a gunman opened fire on a high-level security meeting attended by top US commander General Scott Miller, officials said.

At least 12 people were wounded, including three Americans and a provincial governor, in the Taliban-claimed attack that comes two days before Afghanistan´s long-delayed parliamentary elections. Miller was not hurt.

Security forces swarmed the southern city of Kandahar after the shooting that shuttered shops and sent terrified civilians — already on high alert for attacks — into their homes.

The Taliban said Miller and General Abdul Raziq — the police chief of Kandahar province who had a fierce reputation for brutality — were the targets of the shooting.

“General Raziq and the provincial NDS (intelligence agency) chief have been killed, and the governor himself is in a critical condition,” a senior government official told AFP on the condition of anonymity.

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.

The shooter had been killed, he added.

An Afghan journalist working for state media also died, media support group NAI said in a statement.

An Afghan security official told AFP the attack happened as the officials, including Miller, were leaving the meeting.

Miller was not hurt in the shooting, NATO´s Resolute Support mission spokesman Colonel Knut Peters said in a statement.

Three Americans, including a soldier, civilian and contractor, were wounded in the cross-fire and had been evacuated from the scene.

“Initial reports indicate this was an Afghan-on-Afghan incident,” Peters said.

“We are being told the area is secure.”

A hospital official told AFP that several senior officials had been brought to the medical facility, but they would not provide further details.

Another witness said the city was “full of military forces”.

“They don´t allow anyone to come out of their houses,” he told AFP.

Raziq, an anti-Taliban strongman, was widely seen as a bulwark against the insurgency in Kandahar, the militant group´s birthplace, and had previously survived multiple assassination attempts.

He long controlled the province with an iron hand and was accused of running secret torture chambers, an allegation he denied.