Singapore's Prime Minister Lee Hsien Loong signs a guestbook next to Malaysia's Prime Minister Mahathir Mohamad prior to their private meeting at the Perdana Leadership Foundation in Putrajaya

Singapore’s Prime Minister Lee Hsien Loong signs a guestbook next to Malaysia’s Prime Minister Mahathir Mohamad prior to their private meeting at the Perdana Leadership Foundation in Putrajaya

Singapore's Prime Minister Lee Hsien Loong signs a guestbook next to Malaysia's Prime Minister Mahathir Mohamad prior to their private meeting in Putrajaya, Malaysia, May 19, 2018. Department of Information via Reuters/Hafiz Itam

May 28, 2018 3:48 PM (UTC+8)