Two children, aged eight and 10, killed in attack, police saypublished at 17:06 British Summer Time 27 AugustBreaking
O'Hara goes on to say the gunman was carrying three weapons - a rifle, a shotgun and a pistol.
He describes shooting into a church full of children as "sheer cruelty and cowardice".
"Two young children, aged eight and 10, were killed where they sat in the pews," O'Hara says. "Their parents have been notified."
He adds that 17 other people were injured - 14 of them children.
Two of those children are in critical condition, he says.