KUWAIT CITY, Sept. 29 (Xinhua) -- Kuwaiti Emir Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah passed away on Tuesday, according to Amiri Diwan.

On July 23, the emir left for the United States to complete medical treatment following his recent surgery, the Kuwait News Agency (KUNA) reported.

The emir was admitted to hospital on July 18 for a medical checkup and had a "successful" surgery a day later, KUNA quoted Minister of Amiri Diwan Sheikh Ali Jarrah Al-Sabah as saying.

Currently, the Kuwaiti Crown Prince Sheikh Nawaf Al-Ahmad Al-Jaber Al-Sabah carries out some of emir's duties, according to KUNA.