ISLAMABAD: International Security Assistance Force (Isaf) and Pakistan’s military have come up with differing versions of an incident which took place on Sunday following an attack on Isaf post by insurgents.

A day after a press statement was issued by Isaf, a spokesman of Pakistan's military said the Isaf had engaged the fleeing militants on the Afghan side of the border and informed a Pakistani post on the Pakistan-Afghan border.

The later version of Pakistan's military contradicts an earlier statement issued by Isaf which said that after an attack on the Isaf base in Paktika on Sunday, the international force in Afghanistan launched “a coordinated artillery strike into Pakistan”.

Earlier in the day, BBC quoted a senior officer of Pakistani Army as saying that the “attack by the Isaf forces took place in Angoor Adda in South Waziristan”.

The Isaf statement said the military post in Paktia had received two separate rocket attacks from a location within Pakistan after which Isaf attacked the “enemy position” in Pakistan.

The statement was released following the denial of a Washington Post story by the government that a tacit understanding existed between Pakistan and international forces in Afghanistan regarding targeting of militants inside Pakistani territory.