Thailands King Bhumibol Adulyadej, who was the worlds longest-reigning monarch, died in hospital on Thursday, the palace said in an announcement.

The palace did not give a reason for his death. He was 88 years old, Reuters reported.

"His Majesty has passed away at Siriraj Hospital peacefully," the palace said, adding he died at 15:52 (0852 GMT).

His son and heir apparent, the 63-year old Crown Prince Maha Vajiralongkorn, is expected to become Thailands new king.

Source: ANTARA