Palestinian medical workers say Israel launched an air strike against a vehicle in the central Gaza Strip Monday, wounding three Palestinian militants and at least two pedestrians.
Witnesses said they believed the car contained members of the al-Aqsa Martyrs Brigades, a violent wing of President Mahmoud Abbas' Fatah group.
The latest violence comes a day after Israel allowed 100 Palestinians stranded in Egypt since mid-June to cross into Israel on their way back to the Gaza Strip.
The Palestinians were the first of more than 600 Gaza residents expected to return home by the end of Monday under a deal reached between Israel and Egypt.
The Palestinians have been stuck in Egypt because of a dispute over the Rafah crossing point on the Egypt-Gaza border.
The terminal has been shut down since the militant group Hamas seized control of Gaza in mid-June.
Some 6,000 Palestinians in all have remained stranded in Egypt since then. A spokesman for Palestinian President Mahmoud Abbas (Riad Maliki) said he believes all the stranded Palestinians will eventually be allowed to return to Gaza.
Some information for this report was provided by AFP, AP and Reuters.