It appears that the Chinese are providing the Taliban with sophisticated weapons possibly through Iran:
Britain has privately complained to Beijing that Chinese-made weapons are being used by the Taleban to attack British troops in Afghanistan.
The BBC has been told that on several occasions Chinese arms have been recovered after attacks on British and American troops by Afghan insurgents.
The authorities in Beijing have promised to carry out an investigation.
This appears to be the first time Britain has asked China how its arms are ending up with the Taleban.
[...]
Afghan officials have also privately confirmed to the BBC that sophisticated Chinese weapons are now in the hands of the Taleban.
They said these included Chinese-made surface-to-air missiles, anti-aircraft guns, landmines, rocket-propelled grenades and components for roadside bombs.
[...]
The Afghan government considers China to be a friend, and a much less meddlesome ally than the other big player in its neighbourhood, India.
But, the counter-terrorism official added, "China is worried about the presence of the US in the region".
[...]
So instead of Pakistan being the transit point for these weapons, the finger is being pointed by many commentators towards Iran.
The Afghan government has long acknowledged privately that Iranian intelligence agencies have been active in southern Afghanistan post-9/11.
Iran has been pursuing a policy of building up proxy networks to be able to attack American forces in response to any US attacks against Teheran's nuclear infrastructure.
[...]
Unnamed US officials have recently been quoted as saying that China has been selling arms to Iran which Iran is then passing on to insurgent groups in Afghanistan and Iraq.
