Kabul: Pakistan is the main source of Afghanistan's insecurity, the country's intelligence chief said on Thursday.

There could be no peace here if the war against militants was not shifted to include Pakistan, he said.

In the strongest comments by an Afghan official yet, director-general of intelligence Amruallah Saleh said enemy training sites and organisational and financial resources all lay inside Pakistan.

"Pakistan has not given up its interference and aggression," Saleh told parliament's lower house, which is considering his renomination as intelligence chief.

Saleh conceded there were shortcomings in the Afghan government, but said the source of insecurity lay on the other side of the Durand Line dividing Afghanistan from Pakistan.

"As long as the war against terrorism is not extended openly and seriously from Afghanistan, we cannot restore full security in our country," he said.

"The enemy's organisation setup, the enemy's financial resources, the enemy's training sites and all it has, lie on the other side of the Durand Line where our arms can't reach."

Fighting in Afghanistan is at its worst since a US-led coalition drove the hardline Taliban from power in 2001. Most of the increase has been in the south and east, the Taliban's heartland bordering Pakistan.

Both Islamabad and Kabul are major US allies in its war on terrorism, but they have exchanged harsh words in recent months over the campaign against the Taliban, once supported by Pakistan, undermining already long uneasy ties.

More than 1,800 people have been killed in the Taliban-led insurgency, attacks by drug barons and in operations involving foreign forces this year, mostly in the south and east.

The toll includes more than 80 foreign soldiers.

Saleh said his organisation had given Pakistan intelligence showing Taliban and other militants operating in Pakistan.

"But until today, none of the training camps has been closed," he said.

New Delhi makes the same charges against Pakistan over support for militants in Kashmir.