ABOUT 300 Ethiopian troops crossed into Somalia today, a top Islamist said, as Islamic fighters who wrested control of Mogadishu moved inland toward the seat of Somalia's interim government. Somalia's interim President Abdullahi Yusuf, a former warlord, is closely allied with Addis Ababa, which was instrumental in his election after peace talks in Kenya in 2004. "There are Ethiopian troops just past the border and coming in," Islamic Courts Union Chairman Sharif Sheikh Ahmed said, citing the incursion in Dollow in southwest Somalia this morning. The Ethiopian Government had no immediate comment. Dollow is near the intersection of the Kenyan,...