Egypt army hits Sinai militants, at least 31 killed, injured: sources

At least 31 people were killed or injured on Saturday when the Egyptian army mounted a large operation against militants in North Sinai, security officials said.
Dozens of armored vehicles backed by attack helicopters took part in the operation near Sheikh Zuweid, a few kilometers (miles) from the Palestinian Gaza Strip.
Another 15 people were detained in the operation.