FACTBOX - Ships held by Somali pirates

(Reuters) - Somali pirates have seized at least 36 ships this year, according to the International Maritime Bureau. At least 14 ships with 243 crew are still held, including Saudi tanker Sirius Star, the biggest ship ever hijacked.

Below are some of the ships believed to be held:

CENTAURI: Seized September 17. Had 26 Filipino sailors on board. It was attacked off Somalia by pirates in a speed boat, armed with three rocket launchers.

CAPT. STEPHANOS: Seized September 21. The freighter was flying the Bahamas flag. It was carrying a cargo of coal and has 17 Filipinos, one Chinese and a Ukrainian aboard.

FAINA: Seized September 24. The ship was carrying 33 T-72 tanks, grenade launchers and ammunition destined for Kenya's Mombasa port. Pirates have demanded $20 million (13 million pounds) in ransom.

AFRICAN SANDERLING: Seized October 15. The Panama-flagged, Japanese-operated, and Korea-owned bulk carrier has 21 Filipino crew aboard.

STOLT STRENGTH: Seized November 10. The chemical tanker with 23 Filipino crew aboard was hijacked by pirates in the Gulf of Aden. It was carrying 23,818 tonnes of oil products

THE KARAGOL: Seized November 12. The Turkish ship with 14 crew, was hijacked off Yemen. It was transporting more than 4,000 tonnes of chemicals to the port of Bombay.

TIANYU 8: Seized November 13/14. The Chinese fishing boat was reported seized off Kenya. The crew included 15 Chinese, one Taiwanese, one Japanese, three Filipinos and four Vietnamese.