11.   A Palestinian security official said two Israeli helicopters were overflying the area at the time, and said one of them had possibly fired a missile.

12.   A Palestinian security source said an Israeli helicopter was overflying the area, the road between Gaza City and Khan Yunis, at the time of the explosion.

13.   A Palestinian security source said two Israeli helicopters were overflying the area, on the road between Gaza City and Khan Yunis, at the time.

14.   A Palestinian security official said two Israeli helicopters were overflying the area at the time of the blast.

15.   A Palestinian security official said two Israeli helicopters were overflying the area where the car was blown up, and said one of them had possibly fired a missile.

16.   A Palestinian security source said two Israeli helicopters were overflying the area, on the road between Gaza City and Khan Yunis, at the time of the explosion.

17.   Bosnian television Monday reported that Croatian Serb warplanes operating from Ubdina in eastern Croatia had overflown the area.

18.   But he said UNHCR staff had been refused permission to overfly the area, and that he was not able to confirm the reports.

19.   Colombian Air Force planes were overflying the area and local fire fighters and rescue squads had been placed on alert.

20.   The order was repeated Sunday in radio messages broadcast by a navy aircraft overflying the area.