No formal offers have been made by Nato states in response to requests by commanders in Afghanistan for 2,500 extra troops, Nato says.
Members are meeting in Belgium amid pressure from the International Security Assistance Force, which is fighting in southern Afghanistan.
Differing rules of engagement between Nato states are creating difficulties.
However, a Nato spokesman said there were "positive indications" some might consider sending forces in the future.
There are at least 18,500 foreign, mainly Nato soldiers in Afghanistan in addition to about the same number of US troops deployed.
This is why Osama bin Laden is still at large. We've prioritized a bullshit snipe hunt and practically ignored Afghanistan.
Tags: news politics Afghanistan war Iraq disaster terrorism Bush Rumsfeld
