Heavy rainfall and flooding along the Mekong River killed 168 people this year and damaged hundreds of thousands of hectares of rice and other crops across the country.
The Cambodian Supreme Court on Friday ordered the release of housing activist Yorm Bopha, who has been held for 14 months on charges her supporters say were exaggerated in hopes of curtailing eviction protests.
Yorm Bopha, a community leader and housing rights activist, is accused of assaulting two motorcycle taxi drivers in 2012.
The rights group Adhoc estimates than some 700,000 people have been affected by land disputes since 1990.
Opposition leader Sam Rainsy on Thursday urged Cambodian authorities to reopen an investigation into a deadly bridge stampede during the Water Festival in 2010.
Demonstrators burned some 100 arrest warrants already issued by the investigating judge, Te Sam Ang, who ordered the arrest of Yorm Bopha, 29, in August 2012.
Housing rights activists demonstrated outside the Supreme Court on Tuesday, four days before judges there will decide on the case of Yorm Bopha, an activist whose supporters say she is being held without proper evidence.
Shinzo Abe will make a two-day visit to Cambodia this weekend, where he is expected to sign agreements on education and UN peacekeeping training, as well as health initiatives.
Police spokesman Khiet Chantarith said Chhouk Bandith has fled abroad, though he declined to say which country.
Coca-Cola issued a statement last week saying it has a “zero tolerance” policy on land grabbing, and will begin assessment of sugar sources in seven countries, including Thailand.
One woman, a street vendor, was shot and killed in the clashes. Police say they are investigating the shooting.
One woman was killed and at least five others were wounded when protesters clashed with police outside the home of Prime Minister Hun Sen on Tuesday.