Security forces battled gunmen holed up in a mountainous forest east of Chechnya for a second day Friday and at least five officers were killed, regional officials said. An unknown number of militants were also killed. The fighting in the southern districts of Dagestan was some of the fiercest to hit the poor, volatile North Caucasus republic in years. State-run TV showed dozens of members of the security forces and vehicles perched on hillsides outside the Karabudakhkentsky district village of Kakashura. Helicopter gunships were shown firing missiles into a forest where police said between 10 and 15 heavily armed gunmen were located, not far from the border with Georgia and Azerbaijan.