Three Israeli soldiers have been killed in northern Gaza, the Israeli military said on Friday. The three men, aged 21 and 22 years old, were killed when a bomb exploded on a tank in Jabalia. Several soldiers were injured in the incident and are being treated in hospital. Israeli forces have been operating in the Jabalia refugee camp in northern Gaza for weeks. The humanitarian situation in the area has been described as catastrophic by witnesses. The IDF says 45,000 civilians have recently fled.