CAIRO, Aug 15 (Reuters) - A Hamas guard who killed an Israeli hostage acted "in revenge" and against instructions after he heard news that his two children had been killed in an Israeli strike, a spokesperson for the group's armed wing said on Thursday.

"The (Hamas) soldier assigned as a guard acted in a retaliatory manner, against instructions, after he received information that his two children were martyred in one of the massacres conducted by the enemy," Abu Ubaida said on Telegram.

"The incident doesn't represent our ethics and the instructions of our religion in dealing with captives. We will reinforce the instructions," he added.