This seems like a troubling development, with the status of western border still not clear after 56 years.
http://www.dawn.com/2003/04/18/top6.htm
Islamabad, Kabul trade charges: Border clash in Waziristan Agency
By Zulfiqar Ali
PESHAWAR, April 17: Pakistan and Afghanistan on Thursday accused each other of intruding into their territories following an overnight clash between border forces of two countries.
Officials said Pakistan had put its security forces on alert around Ghulam Khan checkpoint in North Waziristan Agency on Thursday amid tension to prevent incursion of the Afghan forces into the area.
Reports reaching here from the troubled area indicated that tension still prevailed and troops from both sides had taken positions along the border.
NWA Assistant Political Agent Zaheerul Islam told Dawn by telephone from Miramshah, the NWA headquarters, that contingents of Touchi Scouts had been sent to the border and added that the Afghan government had called back its forces from the border.
Mr Islam insisted that the Pakistani militia were fired at when they moved to the area to flush out elements of the Afghan militia force who had crossed into the Pakistani territory.
**He said the law enforcement agencies had arrested six tribesmen who had invited the Afghan security forces to visit Bahadur Kali near Ghulam Khan checkpoint. They were identified as Gul Habib, Daud, Mohammad Ayub, Raqib Khan, Mir Rehan and Sher Alam.
Local people told reporters that tribesmen had invited the Afghan militia to discuss some development schemes for their area. The Afghans claim the area falls into Afghanistan territory and accuse the Pakistani forces of intruding into their territory. **
Sources said Afghan forces had arrested two Khasadars of the North Waziristan Agency.
Pakistani officials said Afghan security forces had penetrated into Pakistan territory on Wednesday which led to an exchange of heavy machine-gun fire. They said Afghan forces led by the commander of 25 Division Army, Khail Baz, held a meeting with some tribesmen of the North Waziristan Agency and offered some development schemes for the area.
Afghan Interior Minister Ali Ahmad Jalali told BBC that Pakistani border security forces intruded five kilometres into their territory and Afghan forces opened fire to expel them.
There had been similar disputes between the two countries in the past, the recent one in Mohmand Agency where a possible clash was averted apparently on the understanding that the matter would be resolved through talks at a later date.
The latest incident comes only days before Afghan President Hamid Karzai is due in Islamabad on a day-long state visit.
AFP adds: “Last night there was a report from the police forces in Khost area that Pakistani militias crossed the border in Ghulam Khan village and there was an encounter with government border forces,” Mr Jalali told a press conference in Kabul.
“The Pakistani militia, they say, entered five kilometres inside Afghan territory and after a counter-offensive by border forces they retreated across the border,” he said.
There were no immediate reports of casualties but Mr Jalali said the situation remained “tense” at the border village. “We are trying to find out more about it and determine the circumstances under which this incursion happened.”