At least one woman has been thrown to the ground as security guards broke up a peaceful protest by wives and family members of jailed Cambodian opposition figures in Phnom Penh.
Employed by local authorities, the guards blocked the group from demonstrating outside the capital's court building on Friday.
The ensuing confrontation saw the woman hurled to the ground, a moment caught on camera.
Such tactics have been regularly used against the largely female group, which has conducted regular rallies demanding the release of the men.
According to rights group Licadho, the woman thrown to the ground was Seng Chanthorn.
Chanthorn is the wife of Sun Thon, an opposition party member and unionist, who was imprisoned in June on an array of charges widely seen as politically motivated.
Some 23 former members of the now banned Cambodia National Rescue Party remain behind bars.
The government, however, has continued its crackdown on critics. Prominent union leader Rong Chhun remains behind bars after being seized in July.
On Thursday, three members of prominent environmental group Mother Nature were arrested as the non-governmental organisation prepared to stage a protest against a Phnom Penh lake being filled in with earth, reported local outlet VOD on Thursday.
Following the arrest, the Swedish embassy was among the voices expressing concern. In a tweet, the embassy said that protecting the environment and freedom of expression were "indispensible" for sustainable development.
"The arrest yesterday of young persons in PP raising environmental issues gives reason for concern. Sweden is following this closely."