The world’s longest-serving monarch died in Bangkok’s Siriraj Hospital Thursday afternoon.

A statement from the Ministry of Foreign Affairs said that the Singapore Government is deeply saddened to learn of King Bhumibol’s death.

“His Majesty King Bhumibol was an outstanding and deeply revered monarch. Throughout his long reign, he worked tirelessly for the betterment of the Thai people,” the statement said.

“His Majesty King Bhumibol also made great contributions for the enduring friendship between Thailand and Singapore,” it added.

The ministry also said that King Bhumibol’s devotion to the Thais will “long be remembered and respected both in the Kingdom of Thailand and around the world”.

Deputy Prime Minister Teo Chee Hean also penned a condolence message on his Facebook page.

In it, he conveyed deepest condolences to Queen Sirikit and the people of Thailand on the death of King Bhumibol.

“His Majesty was a wise and much loved monarch who did much for the people of Thailand,” wrote Teo, who is Acting Prime Minister as PM Lee Hsien Loong was on an official visit to Australia.

“He also contributed much to strengthening the good relations between Thailand and Singapore.”