**Nato forces in Afghanistan say that six of their soldiers have been killed in a single day during their major offensive against the Taliban in the south.**Two of those who died on Thursday were British; the nationalities of the other four have not been given.
Earlier, a Nato air strike killed seven Afghan policemen in the northern Kunduz province, Afghan officials said.
The officers were mistakenly hit after a joint Nato-Afghan patrol was ambushed by Taliban insurgents, officials said.
The Nato-led International Security Assistance Force (Isaf) said it was investigating the reports.
‘Resistance’
On Thursday, Isaf said four Nato soldiers had died and Britain’s Ministry of Defence confirmed that two Britons were among them.
Then, in a brief statement, Isaf said two further service members had died during Operation Moshtarak on Thursday.
“One service member was killed by small-arms fire and another died following a separate small-arms fire incident,” it said.
Operation Moshtarak, which means “together” in Dari, began a week ago in the southern province of Helmand.
About 15,000 Afghan and Nato troops, mostly US and British, are battling Taliban in and around the town of Marjah.
Meanwhile, Nato-led forces said they were still meeting with some “determined pockets of resistance”, more so in Marjah than in Nad Ali.
Afghan and British forces were pressing on with clearing operations, but roadside bombs, known as Improvised Explosive Devices or IEDs, remained the main threat to the forces, with some intense small-arms engagements still occurring, it said.
British Maj Gen Nick Carter, in command of Nato forces in southern Afghanistan, has said Operation Moshtarak would take 25-30 days to secure the area.
He said that more time would be needed after that to fully gauge the operation’s success.
Nato officials said they had learned from intercepted Taliban communications that the insurgents were running low on ammunition and have called for support.
Afghan commanders have said the Taliban in Marjah are using civilians as human shields to deter attacks from the US and Afghan troops.
On Sunday, 12 civilians died in a missile strike that Nato said had also killed three Taliban militants who were in the same house.