A lawyer for Russian opposition leader Alexei Navalny, who died in prison this month, has reportedly been arrested in Moscow.
According to Russian media sources, Vasily Dubokov was detained for "violating public order".
Following Navalny's death, Mr Dubokov accompanied his mother to the Arctic prison colony where he died on 16 February.
The Russian authorities have not yet confirmed the arrest of Mr Dubokov.
In October 2023, other lawyers for Navalny - Vadim Kobzev, Igor Sergunin, and Aleksei Lipster - were arrested on charges of "extremism".
In January, Olga Mikhailova, another lawyer for the opposition leader, said she had been charged with the same crime and decided to remain in exile.
Navalny's body was held by prison authorities for more than a week following his death. His mother, Lyudmila Navalnaya, travelled to the remote "Polar Wolf" jail where he died to retrieve his body, accompanied by Mr Dubokov.
The body was handed over to his mother eight days after his death. Mrs Navalnaya said she was threatened by authorities, who wanted her son to be buried in "secret".
Navalny's allies have said they are looking for a place to hold a public memorial for the former opposition leader.
However, Navalny's Press Secretary Kira Yarmysh said on Tuesday that most funeral locations they had contacted had refused to allow a ceremony on their premises.
"Some places say that the premises are occupied, some refuse when the name Navalny is mentioned. In one place we were directly told that funeral agencies were prohibited from working with us," Ms Yarmysh wrote.
