Gaza Strip ? Palestinian mortar fire killed a man at a factory in southern Israel on Thursday, prompting an Israeli reprisal airstrike that apparently missed its target and killed a 6-year-old girl in the Gaza Strip.

The burst of violence dealt a new setback to Egyptian efforts to broker a truce between Israel and the militant group Hamas and raised the threat of worse violence.

The bloodshed came a day after moderate Palestinian President Mahmoud Abbas called for renewed dialogue with Hamas, whose gunmen seized control of Gaza a year ago in fighting with Abbas’ security forces.