A Palestinian Health Ministry official says an Israeli air strike on a smuggling tunnel between the Gaza Strip and Egypt has killed three Palestinians and wounded seven. Health Ministry official Dr. Moaiya Hassanain said the men were all smugglers caught in the tunnel during the Israeli strike early Tuesday morning. An Israeli military statement said the air force struck in retaliation for a cross-border mortar attack Monday into southern Israel. The military said Palestinians in Gaza have fired about 220 rockets and mortar shells at Israel since it ended a three-week war against the militants on Jan. 18.