Twenty people have been killed and more than 30 injured in central Gaza after four trucks overturned on a crowd, the Hamas-run civil defence agency says. Crowds rushed to the vehicles on a road south east of Deir al-Balah on Tuesday evening. They climbed on top of the trucks, causing the drivers to lose control, local journalists told the BBC. The area was under Israeli military control and the roads were rugged and dangerous, civil defence agency spokesman Mahmoud Basal said. The private