The pair had been knocked into the Nan river, which ran through their resort.
The arrest of the siblings from Wirral follows a public appeal by a British organised crime unit.
A funeral has been held for 13-year-old boxer Anucha Tasako, who died of a brain hemorrhage after a Muay Thai fight.
CCTV footage allegedly shows Lee Furlong and Canadian Brittney Schneider vandalising the Tha Pae Gate.
The 12 Thai boys and their football coach who spent almost three weeks trapped in a flooded cave played a friendly in Argentina.
The bodies of Alan Hogg and Nhot Suddaen were found in Phrae province.
Alan Hogg and his wife Nhot Suddaen were said to have been killed over a family dispute.
Vernon Unsworth says the Tesla chief falsely accused him on Twitter of being a paedophile.
All four had been stateless before their dramatic rescue last month.
The Wild Boars football team recounted the moment British divers found the group stranded underground.