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Ukraine says it will probe school shelling that left 2 teenagers dead in rebel-control east

  • Unidentified parents of the killed and injured children embrace at the place of the tragedy at a football pitch in Donetsk, Eastern Ukraine on Thursday, Nov. 6, 2014, where shelling took place Wednesday. Two bloodied coats lay on the school pitch early Thursday morning, a day after an artillery strike killed two teenagers and injured four more as they were playing football. The attack on the high school is just one example of the blatant violations of the September cease-fire between the rebels and the Ukrainian government which have become daily routine in the past weeks. (AP Photo/ Mstyslav Chernov)

    Unidentified parents of the killed and injured children embrace at the place of the tragedy at a football pitch in Donetsk, Eastern Ukraine on Thursday, Nov. 6, 2014, where shelling took place Wednesday. Two bloodied coats lay on the school pitch early Thursday morning, a day after an artillery strike killed two teenagers and injured four more as they were playing football. The attack on the high school is just one example of the blatant violations of the September cease-fire between the rebels and the Ukrainian government which have become daily routine in the past weeks. (AP Photo/ Mstyslav Chernov)  (The Associated Press)

  • Oksana Safonova cries in a hospital near the bed of her son Kirill, one of the boys injured by shelling at a football pitch in Donetsk, Eastern Ukraine on Thursday, Nov. 6, 2014. Two bloodied coats lay on the school pitch early Thursday morning, a day after an artillery strike killed two teenagers and injured four more as they were playing football. The attack on the high school is just one example of the blatant violations of the September cease-fire between the rebels and the Ukrainian government which have become daily routine in the past weeks. (AP Photo/ Mstyslav Chernov)

    Oksana Safonova cries in a hospital near the bed of her son Kirill, one of the boys injured by shelling at a football pitch in Donetsk, Eastern Ukraine on Thursday, Nov. 6, 2014. Two bloodied coats lay on the school pitch early Thursday morning, a day after an artillery strike killed two teenagers and injured four more as they were playing football. The attack on the high school is just one example of the blatant violations of the September cease-fire between the rebels and the Ukrainian government which have become daily routine in the past weeks. (AP Photo/ Mstyslav Chernov)  (The Associated Press)

  • A teenager's sport shoe lies near the football pitch in Donetsk, Eastern Ukraine on Thursday, Nov. 6, 2014, where shelling took place Wednesday. Two bloodied coats were lying on the school pitch early Thursday morning, a day after an artillery strike killed two teenagers and injured four more as they were playing football. The attack on the high school is just one example of the blatant violations of the September cease-fire between the rebels and the Ukrainian government which have become daily routine in the past weeks. (AP Photo/ Mstyslav Chernov)

    A teenager's sport shoe lies near the football pitch in Donetsk, Eastern Ukraine on Thursday, Nov. 6, 2014, where shelling took place Wednesday. Two bloodied coats were lying on the school pitch early Thursday morning, a day after an artillery strike killed two teenagers and injured four more as they were playing football. The attack on the high school is just one example of the blatant violations of the September cease-fire between the rebels and the Ukrainian government which have become daily routine in the past weeks. (AP Photo/ Mstyslav Chernov)  (The Associated Press)

Authorities in Ukraine say security services will investigate the shelling of a school in the rebel-held east that left two teenagers dead and four others injured.

Security spokesman Andriy Lysenko said Thursday that preliminary information indicates the shells flew into the schoolyard in Donetsk from a location controlled by separatist forces.

But the rebels swiftly blamed Ukrainian forces for Wednesday's deadly attack, saying government troops indiscriminately target residential areas in eastern Ukraine.

The UN estimates more than 4,000 people have been killed over six months of fighting between Ukrainian government forces and pro-Russian separatists. Several hundred have died since a much-violated cease-fire was signed in early September.