Sri Lankan athletes participate in the inaugural ceremony of the Commonwealth Games in Birmingham.
The nine athletes and a manager vanished after completing their events, the official said, requesting anonymity.
Three of them — judoka Chamila Dilani, her manager Asela de Silva, and wrestler Shanith Chathuranga — had disappeared last week. That prompted a police complaint by the Sri Lankan officials.
"Since then, another seven have vanished," the official said, without identifying them. "We suspect they want to remain in the UK, possibly to get employment."
The 160-strong Sri Lankan contingent's management possessed the passports of all members to ensure they returned home. That failed to deter some from leaving.
British police located the first three that disappeared, but as they had not violated local laws and held visas valid for six months, no action was taken, the Sri Lankan official told AFP.
"In fact, the police got us to return the passports that we were holding as a deterrent against defections," the official said. "The police have not told us about their whereabouts."
Sri Lankan athletes have been reported missing from international events in the past.
In October last year, Sri Lanka's wrestling manager abandoned his team and disappeared in Oslo during a world championship tournament.
During the 2014 Asian Games in South Korea, two Sri Lankan athletes made a run for it and were not found.
And in 2004, when Sri Lanka did not even have a national handball team, a 23-member group pretending to represent the country conned their way to a tournament in Germany and disappeared.
Badminton star Chou Tien-chen is heading into the 2020 Olympics coachless, but hopes for Tokyo gold with the help of his physiotherapist and expert consultations.
The Abes' success gave Japan its third and fourth gold medal of the day after Yuto Horigome took skateboarding's first Olympic title and swimmer Yui Ohashi was the surprise winner of the women's 400m individual competition.
Family members were not allowed to accompany athletes due to coronavirus restrictions but later the International Olympic panel had announced that breastfeeding mothers would be allowed to bring their children to Japan.
Lamia, whose first gold medal came at the age of six when she won the inaugural Dubai International Junior Rhythmic Gymnastics Championships in 2017, says she is focused fully on her goal to win gold at the Youth Olympic Games.
Starting Line-ups for the World Cup Group D match between Tunisia and Australia at Al Janoub Stadium in Qatar on Saturday (kick-off 1000 GMT):
Rodrigo Lasmar, the doctor for the Brazilian football federation (CBF), said the 30-year-old had suffered "ligament damage" and would miss the match against Switzerland on Monday.
The 10th edition of the tournament, its largest to date, saw a record participation of more than 1,500 female athletes who competed in 10 sports between Nov.7 and 21, 2022.
The main area includes many big screens and comfortable seating to host hundreds of supporters who will be watching and cheering for their favorite teams, in addition to spacious indoor and outdoor areas surrounded by gaming areas...