Israel hints at full-scale invasion

Israeli troops met fierce resistance from Hezbollah guerrillas Thursday as they crossed into Lebanon to seek tunnels and weapons for a second straight day, and Israel hinted at a full-scale invasion. Israel warned residents to "immediately" flee a nearly 20-mile swath of south Lebanon along the border. Its warplanes also launched new airstrikes on Beirut's southern suburbs, a Hezbollah stronghold, shortly after daybreak, followed by strikes in the guerrillas' heartland in the south and eastern Bekaa Valley.