The BBC reports that NATO is calling the Taliban attack on a prison in Kandahar – releasing 900 inmates, under half of them members of the Taliban – is an “isolated incident.” One supposes that this probably is better for Taliban morale, and from their point of view, might be thought a “major tactical breakthrough” or a “show of strength.” More from the BBC report after the jump:

NATO has admitted a jail-break by hundreds of prisoners after Taleban fighters blew up a Kandahar prison gate was a success for the Taleban. But a Nato spokesman said the mass escape was an isolated incident that did not mean the militants were gaining strength in Afghanistan generally.

Afghan and Nato troops are searching for 350 militants who were among some 900 inmates to escape, officials said.

Fifteen guards died in the truck bomb and rocket attack in the southern city.

“I understand it was a very successful move for the Taleban, I’m not denying that, but we should not over-react and exaggerate in the results,” Nato spokesman General Carlos Branco told the BBC.

“It’s very soon to make an assessment and say that it was a strategic blow.”

‘Major breach’

The Afghan police and army are conducting house-to-house searches in Kandahar while Nato forces are using helicopters to secure the city and the outlying districts.A state of emergency was declared in the city, the second biggest in the country, after the attack on Friday night. All residents were ordered to stay in their homes.

Thirty fighters on motorbikes and two suicide bombers attacked the prison on Friday night, freeing about 400 Taleban members, said Taleban spokesman Qari Yousef Ahmadi.

A number of high-ranking Taleban field commanders are believed to be among those who escaped.

Prison chief Abdul Qabir said some of the inmates had chosen to stay behind during the break-out. They were said to be mostly women, children and political prisoners.

Wali Karzai, head of the Kandahar provincial council and also the brother of the Afghan President Hamid Karzai, suggested that the search for the escapees might prove futile.

“Honestly I don’t know because this area you can walk to the other districts,” he said.

“They might recapture some people but I don’t know.”

Key battleground

An eyewitness told the BBC that the force of the initial blast had been enough to blow out windows up to 3km (1.7 miles) from the prison.