Government troops advanced Tuesday on the last urban area in the north of Sri Lanka still in the hands of Tamil Tiger rebels, the military said. Soldiers were "on the fringes of Puthukkudirirppu," a small town on a narrow strip of land in the northeast controlled by the Liberation Tigers of Tamil Eelam (LTTE), Brigadier Udaya Nanayakkara said. "Battlefield reports indicate intense fighting going on in the area as troops close in on Puthukkudirirppu," the defence ministry said, adding 13 bodies of rebel fighters were recovered Tuesday. The LTTE did not comment on the fighting, but said 10 civilians were killed and 25 injured when troops fired artillery guns at the densely populated Puttumattalan area early Tuesday. "More than 30 civilians were killed Monday and many more injured," the Tigers added in a statement.