PESHAWAR: Two Pakistani personnel were wounded when Afghan and Nato forces attacked the Pakistani border check post in South Waziristan's Angoor Adda area on Wednesday, DawnNews reported.

Pakistani security forces retaliated the attack on the Pak-Afghan border and three Afghan soldiers were killed as a result.

Exchange of fire at the site of the clash was ongoing between Pakistani and Afghan forces.

However, no official statement confirming the incident was issued by the government.

Moreover, an AP report quoted officials as saying that Afghan and Pakistan forces traded artillery fire in two places along the border.

In one incident, a Pakistani official said two soldiers were wounded on Wednesday in the Angoor Adda.

Villager Ahmadullah Wazir said several shops were damaged.

Separately, Pakistani officials and Afghan military official Abdul Rahman said that border guards exchanged fire in North Waziristan late on Tuesday. No injuries were reported.

The incidents appear unrelated. The Pakistani officials spoke on condition of anonymity because they were not authorised to talk to the media.

Afghan and Pakistan forces occasionally trade fire but the incidents rarely escalate or have diplomatic consequences.