The ever-reliable Jitu Rai's pistol shot down a gold and a Games record, while the mixed badminton and men's table tennis sides also picked up milestone top finishes as India shone through in both the individual and team events on a splendid day 5 of the 21st Commonwealth Games here.
Three more boxers have since vanished, sparking an Australian Border Force manhunt.
Yombo's disappearance means O'Reilly advances to the semi-final and will at least receive a bronze medal.
Commonwealth Games organisers called for competitors to respect the law, mindful of the fact that more than 100 athletes overstayed their visas at the 2000 Sydney Olympics.
"Nobody said anything, they did not give any condition, they just left". "Come in the village, come see them".
Meanwhile, England's netball team secured their biggest ever victory over New Zealand in their final Pool B match.
The first three left on Sunday night, with two others declared missing on Monday and a further three leaving the village on Tuesday night.
"These athletes. were part of a team that had a training camp before getting to Gold Coast", he said in a statement.
Weightlifter Olivier Matam, and boxers Ndzie Tchoyi and Simplice Fotsala had been due to compete on Tuesday but could not be found, Cameroon team manager Victor Agbor Nso said.
Queensland Commonwealth Games Minister Kate Jones said the Australian Federal Police (AFP) were involved, the Australian Broadcasting Corporation reported.
This was not the first time athletes from the small African nation had gone missing at an worldwide sporting event.
"We would appreciate them sticking within the law, enjoying themselves, but sticking within the law", organising committee boss Peter Beattie told reporters.
Five Cameroonian athletes have been reported missing from the Commonwealth Games athletes village, with suspicion they have fled with the intention not to return home.
"Until it becomes a real issue in terms of visas and so forth we would obviously have to take that very seriously".
"I have lifted a personal best of 215kg in the past but may be it wasn't my day", said the Games debutant, who was happy with a podium finish but a shade disappointed with the colour of his medal.