Pakistan said Tuesday it has arrested 25 militants for attacking the country's gas pipelines and other key installations. Militants have become increasingly active in Pakistan's southwestern province of Balochistan, which borders Afghanistan's former Taliban heartland of Kandahar. But political observers say the arrested militants are not linked with the Taliban or al-Qaida terrorist outfits.They are ethnic Baloch nationalists demanding more autonomy for their province and a larger share in its natural resources. The province's police chief, Chaudhry Mohammad Yaqoob, told reporters in Quetta the suspects received funds for tribal chiefs opposed to the central government in Islamabad.