US Deputy Secretary of State John Negroponte flew into the northern Cambodian tourist hub of Siem Reap in a relaxed start to his three-day official visit, touring the ancient temples of Angkor Wat, local officials said on Sunday, according to DPA. Negroponte arrived in Cambodia from neighbouring Vietnam for a visit which will include meetings with Prime Minister Hun Sen and an array of ministers including Foreign Minister Hor Namhong. He is scheduled to sign a 24-million-dollar agreement on Monday to assist economic development in the country and will hold a press conference on Tuesday morning before flying out, according to a schedule from the US embassy.