KANDAHAR (AFP) - Afghan police said on Friday that 30 security guards had been killed in a clash with Taliban and that another 15 had been wounded. Three NATO soldiers were killed in other attacks. The Taliban attacked and during the fighting 30 guards were killed, around 15 were injured and some others were taken by the Taliban, said the deputy police chief of southern province Helmand. The clashes took place in Helmands volatile Sangin district on Thursday, Kamaludin Sherzai told AFP. Officials earlier said they believed that around 12 guards had been killed when the heavy gunbattles broke out between insurgents and guards working for a road construction company in Sangin. Helmand provincial spokesman Daud Ahmadi said a dozen bodies were evacuated Friday to a hospital in the provincial capital of Lashkar Gah. We know that they were killed during yesterdays fighting with the Taliban. We dont know whether they are guards or workers, he said. The Taliban claimed involvement in Thursdays attack. We launched an attack on the road construction company along the Sangin and Gereshk road, Zabihullah Mujahed, a rebel spokesman, said by telephone, referring to the region where authorities said the fighting took place. We took more than 30 checkposts along the road and killed more than 50 guards, he said, speaking from an undisclosed location. Meanwhile, three NATO soldiers were killed in different attacks, authorities said Friday. Two of the soldiers were killed in a bomb attack in southern Afghanistan on Friday and a third - an American - died in a similar attack on Thursday, the military announced. The nationalities of Fridays casualties were not disclosed but a NATO spokesman denied that they were Americans. NATOs mission in Afghanistan does not disclose the nationalities of its casualties, leaving it for the countries involved to do so. The deaths bring to 441 the number of foreign soldiers killed in the Afghan war so far this year. The total for 2009 was 520, according to an AFP count based on a tally kept by icasualties.org. The force said it killed a woman during an operation on Thursday aimed at capturing a Taliban commander in the eastern province of Khost. Chasing the suspect through walled compounds, the troops opened fire after seeing a gun pointing towards them from a room. The troops later found they had killed a woman, ISAF said in a statement.