The four countries join the United States and Ireland in planning to be absent from the International Boxing Association (IBA) events.

"We have given the same opinion as the Czech Boxing Association before," CBA President Marek Šimák told Radiožurnál Sport.

"It bothers us.

"It's wrong.

"The association is led by a Russian who is in a very close relationship with [Russian President Vladimir] Putin, and everything is paid for by Gazprom.

"The stupid thing is that Europe is small and he (IBA President Umar Kremlev) influences it worldwide with money.

"The problem is that some states allow themselves to be bribed."

Boxing Canada said in a statement its boycott was due to the planned participation of Russian and Belarusian athletes, as well as a protest at the sport's governance.

"Given the continued corruption within the International Boxing Association, we have significant concerns surrounding the risk our sport faces and its future within the Olympic line-up," Boxing Canada President Ryan O'Shea said.

"We understand the implications this decision will have on our national team athletes, and we are working diligently alongside our sport partners to find a suitable replacement tournament to continue developing our high-performance athletes in preparation for the Pan American Games qualifiers as well as the 2024 Summer Olympics in Paris."

Swedish Boxing Association chairman Per-Axel Sjöholm said the IBA's decision to allow Russian and Belarusian athletes to feature was the main factor in their decision to join the boycott.

"We do not accept IBA's handling," said Sjöholm, as reported by Teller Report.

"There is no democracy or transparency.

"We have worked for several years to bring about a change, but without success.

"Then they made the decision themselves to allow Russia and Belarus to compete, moreover under national flags.

"Another reason is that the Olympics are much more important to us than the World Championships organised by IBA.

"So it was an easy decision for us in Sweden."

The IBA, formerly AIBA, has been suspended by the International Olympic Committee (IOC) since 2019.

Relations have continued to sour as boxing has been left off the initial Los Angeles 2028 programme and could still be dropped from Paris 2024.

Governance concerns, financial irregularities and a lack of transparency are key to the IOC's decision.

Šimák claims that more National Federations are considering the boycott and that there are discussions over the potential formation of a new organisation to replace the IBA.

"We are talking about it, and now the Germans have stepped in, and when they decide to do something like this, they usually have it ready," he said.

"He knows that something needs to be done about the current situation.

"There's a lot of talk about it.

"The new association should be pro-European, anti-Putin.

"Above all, we want to continue with boxing at the Olympic Games."

GB Boxing states that the decision to boycott the Women's World Boxing Championships was taken because of "ongoing concerns about the future of boxing’s place on the Olympic programme and the recent move by IBA to allow boxers from Russia and Belarus to compete under their national flags."

The governing body is considering whether to miss the men's event in May, with its Board to make a decision closer to the Championships.

The US and Ireland are members of the Common Cause Alliance led by Dutch official Boris van der Vorst, who challenged Russian incumbent Umar Kremlev for the IBA Presidency last year.

He was declared ineligible by the Boxing Independent Integrity Unit at May's elections in Istanbul before delegates voted against staging a fresh election in Yerevan in September, despite a successful Court of Arbitration for Sport appeal.

Kremlev responded to the US and Irish boycotts claiming that officials who voted for it are "worse than hyenas and jackals".

USA Boxing also argued that the IBA had failed to "address the drastic change of culture requested by the IOC" and cited Kremlev's comments that "not a single boxer, coach or National Federation will be participating in the Olympic Games without IBA".

USA Boxing executive director Mike McAtee hit back at the IBA's statement, describing it as a "brazen public attack".

"USA Boxing and I will not be intimidated or respond to your threatening letter as it would be inappropriate to engage in a public debate regarding your referenced alleged violations," he wrote in a letter to IBA secretary general George Yerolimpos.

The Women's Boxing World Championships are scheduled for March 15 to 26 in New Delhi, followed by the Men's World Championships in Tashkent from May 1 to 14.