JAKARTA, Indonesia (AP) — Indonesia's Lion Air says it has lost contact with a passenger jet flying from Jakarta to an island off Sumatra.

A search and rescue effort has been launched for the Boeing 737-800 plane which departed Jakarta about 6.20 a.m. on Monday.

Lion Air spokesman Danang Mandala Prihantoro said "we can confirm that one of our flights has lost contact, its position cannot be ascertained yet."