The ban on local and foreign tourists at the site will last until April 20, the government agency overseeing the archeological site said.
Cambodia is closing its most famous attraction, the Angkor temple complex, to visitors because of a growing COVID-19 outbreak in the Southeast Asian nation.
Cambodia has confirmed 3,028 cases of infection with the coronavirus, with 23 deaths, since the pandemic began more than a year ago, but the newest outbreak has infected several hundred people. On Thursday, the Health Ministry said 113 cases were reported from local transmission, with two deaths.
The ministry traced the outbreak to a foreign resident who broke hotel quarantine to visit a nightclub in February. That caused a slew of infections and led the government to close public schools, cinemas, bars and entertainment areas in Phnom Penh.