GAZA CITY, Gaza Strip ? Israeli aircraft fired missiles into a car carrying Palestinian militants Friday, killing six people including a bombmaker and his 5-year-old daughter, in the deadliest Israeli attack since the Hamas-led Palestinian government took office.

The air strike in the southern Gaza town of Rafah came as the Palestinian prime minister, Ismail Haniyeh, of Hamas, and moderate President Mahmoud Abbas met to try to settle some of their growing differences.

Earlier this week, Abbas seized more powers from the Islamic militants, including control over security forces. Abbas and Haniyeh agreed to set up a liaison committee and to work together to resolve the looming Palestinian financial crisis, the men said after the meeting.

The Israeli strike targeted a training camp of the Popular Resistance Committees, an umbrella group for gunmen from various factions, including many with ties to the Islamic militant Hamas.

The Israeli military said the aircraft targeted the car as it was leaving the isolated training camp, and Palestinian police said four missiles were fired.

The car was destroyed and four people inside were instantly killed, police said. Two others died later of their injuries.

Among those killed were at least three militants, including Iyad Abul Aynayn, 29, who had ties to Hamas and was a chief bombmaker for the group, and his 5-year-old daughter.

Fourteen people were wounded, most of them militants, police said.