Marines killed amid battle with militants laying siege to Philippine city
Some 13 marines have been killed in fighting with Muslim militants who have laid siege to a city in the Philippines.
It's the biggest single-day loss for government troops since they began fighting the militants allied with Islamic State.
The militants seized Marawi on May 13 and are still occupying parts of the city.
Military spokesman Colonel Edgard Arevalo said the marines were killed in day-long close-quarter combat on Friday.
Forty other marines were wounded.
The government earlier said that the unrest had left 20 civilians, 134 militants and 39 government troops dead.