An Israeli shell has hit a UN-run school in Gaza, killing 15 Palestinians and injuring at least 200 who were seeking shelter from fierce clashes on the streets outside.Pools of blood soiled the school courtyard, which was packed with mainly woman and children, and there is a large scorch mark in the courtyard marking the place where one of the tank shells hit.Although the UN said they had given the Israeli army the co-ordinates of the school to prevent such an incident, the shells landed on the school where families had gathered in the courtyard expecting to be evacuated shortly in a Red Cross convoy.Laila Al-Shinbari, a mother whose son was killed at the school said: 'All of us sat in one place when suddenly four shells landed on our heads ... Bodies were on the ground, (there was) blood and screams. My son is dead and all my relatives are wounded including my other kids.'The director of a local hospital said various medical centres around Beit Hanoun were receiving the wounded. 'Such a massacre requires more than one hospital to deal with it,' said Ayman Hamdan, director of the Beit Hanoun hospital.  Chris Gunness, spokesman for the main U.N. agency in Gaza UNRWA, confirmed the strike and criticised Israel.'Precise co-ordinates of the UNRWA shelter in Beit Hanoun had been formally given to the Israeli army ... Over the course of the day UNRWA tried to coordinate with the Israeli Army a window for civilians to leave and it was never granted,' Gunness said on his Twitter page.Earlier on Thursday, Gunness said that Israeli forces had bombed U.N. shelters on three separate occasions since Monday, in incidents which did not cause injuries.The Israeli military said it was reviewing the incident, saying that rockets launched by Hamas had landed in the Beit Hanoun area during fighting with its forces, and that those rockets may be responsible for the deaths. (dailymail.co.uk)Bakudaily.az