Local and foreign militants fought a gunbattle in northwestern Pakistan, leaving at least 46 dead, officials said, the second such clash this month in a region where the government is urging tribesmen to move against al-Qaida-linked fighters. At least two children were also reportedly killed and around 20 wounded when a stray mortar round from the fighting in South Waziristan hit their school bus. The clash between Uzbek militants and tribesmen continued Tuesdsay after breaking out a day earlier near the town of Wana, a senior military official and a senior government official said. Both spoke on condition of anonymity because they were unauthorized to make comments to media. They did not immediately have further details on the allegiances and identities of the 46 dead.