Five Pakistanis, including a border guard, were shot to death Wednesday by Afghan troops at a border post in the remote Qamruddin zone, authorities told Efe.

Around 20 other people were wounded in the shootout, which broke out shortly after midday, according to a member of the Levies, who protect Pakistan's border in the southwestern province of Baluchistan.

He did not clarify the reasons for the shootout but said that "there was no prior provocation from the Pakistani side."

Cross-border attacks have been the subject of regular controversy between the neighboring countries with mutual accusations over the deaths of civilians and members of the security forces.

Last December, Pakistan accused Afghan troops of killing five civilians in a mortar attack on the tribal area of Southern Waziristan, in the northwestern part of the country.

Eighteen months ago, an Afghan army patrol entered Pakistani territory and killed two villagers in the Killa Saifullah district near the site where the Wednesday incident occurred.

Relations between Pakistan and Afghanistan are going through a turbulent period because of accusations by Kabul of cooperation between political and military factions in Pakistan and the Taliban. EFE