A Palestinian girl climbs on the remains of a building that was destroyed during an Israeli air strike on Rafah in the southern Gaza strip on May 5, 2019. - Gaza militants fired fresh rocket barrages at Israel early today in a deadly escalation that has seen Israel respond with waves of strikes as a fragile truce again faltered and a further escalation was feared. (Photo by SAID KHATIB / AFP)
A Palestinian girl climbs on the remains of a building that was destroyed during an Israeli air strike on Rafah in the southern Gaza strip on May 5, 2019. AFP

Many Gaza attacks in May were unlawful, says Human Rights Watch