KABUL, Afghanistan — Afghan officials say they are investigating allegations by neighboring Pakistan that Afghan forces severely beat Pakistani nationals.

The Saturday protest note from Islamabad's Foreign Office provided no details other than to say that all 29 had valid travel documents.

Afghan Foreign Ministry spokesman Janan Mosazai says he has no information about the allegations, but Kabul will try to investigate them.

Relations between the neighboring countries are poor, with the Kabul government accusing Pakistan of harboring and supporting Taliban insurgents. But last month a top Afghan peace mediator hailed Pakistan's recent decision to free nine Taliban members who favor negotiations, saying it was a sign that Pakistan is willing to bring the militants to the table and end Afghanistan's 11-year war.