(Adds one more dead)

GAZA, Aug 21 (Reuters) - Two Palestinian boys were killed in an Israeli missile strike in the northern Gaza Strip on Tuesday, a Palestinian ministry of health official said.

The official said the boys were in an area close to where militants had fired rockets into Israel. One of the boys was 11 years old. The age of the second was unclear.

Three other boys were wounded, the official said.

The Israeli army said it was checking the report.

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