Israel fired barrages of artillery into southern Lebanon after Hezbollah targeted three Israeli military positions in the disputed Shebaa Farms. There were no immediate reports of casualties. The cross-border fire comes a day after a surprise attack by Palestinian gunmen on Israeli towns left casualties. Hezbollah said it launched rockets and artillery onto three posts in solidarity with the Palestinians. The Israeli military responded by firing artillery into an area of Lebanon where cross-border mortar fire was launched. Israel has held the Shebaa Farms since 1967, while both Syria and Lebanon claim it. The United Nations peacekeeping mission in southern Lebanon has enhanced its presence following developments in Israel and Gaza.