Insurgents have attacked Nato forces in eastern Afghanistan.
Several attackers have been killed in the Taliban attack on a base at an airfield outside Jalalabad, near the border with Pakistan.
Gunmen set off a car bomb and fired rocket-propelled grenades, and reports say the fighting continues. There are no reports of Nato casualties.
The attack comes a day after US General David Petraeus warned of an "industrial strength insurgency" in the country.
Gen Petraeus, who is said to take over command of the US military in Afghanistan, also warned on Tuesday that fighting "may get more intense in the next few months".
He is due to take up his post as Nato commander in Afghanistan following the dramatic departure of Stanley McChrystal last week.
Guerilla-style raid
A Nato spokesman said the perimeter of the base had not been breached.
A Taliban spokesman, Zabiullah Mujahid, said six suicide attackers had taken part in the assault.
The style of this attack, with commandos launching a guerilla-style raid, is typical of the Taliban's increasingly sophisticated tactics, says the BBC's Quentin Somerville in Kabul.
Jalalabad is one of Nato's largest bases in Afghanistan, after Kandahar in the south and Bagram near Kabul.
Both have been attacked by insurgents in recent months.
