Fukushima No. 4 reactor spent fuel pool may be boiling -Kyodo

TOKYO, March 15 (Reuters) - A pool containing spent fuel at the quake-hit Fukushima Daiichi No.4 reactor may be boiling and the water level may be falling, Kyodo news agency quoted an official at the reactor's operator, Tokyo Electric Power Co , as saying on Tuesday.

News of the problem at the shuttered reactor came after the U.N. Nuclear watchdog said earlier on Tuesday that Japan told it a fire had been extinguished at the storage pool.

(Reporting by Edmund Klamann)