NATO Secretary-General Jaap de Hoop Scheffer says some countries have responded to a NATO plea for more troops for Afghanistan, but the alliance has not reached its goal yet.
The alliance is involved in the biggest ground war in its history in Afghanistan, and its commanders say fighting against Taleban insurgents has been more intense than they expected.
Earlier Thursday, two separate suicide bombings killed four people.
A police officer died and four other people were wounded when a man detonated explosives strapped to his body in the southeastern town of Khost.
Another suicide bomber blew himself up near a NATO troop convoy in the town of Lashkar Gah, the capital of southern Helmand province. One British soldier and two children were killed, and several people were wounded, including NATO soldiers.
Some information for this report was provided by AFP, AP and Reuters.