SUCRE — Bolivia's footballers have gone on strike and will refuse to take part in a national team training camp next week unless their grievances are resolved, their union Fabol has said. Bolivia is due to begin its World Cup qualifying campaign in less than one month and the announcement added to the problems in the country, where the head of the football federation has been arrested on graft charges. Fabol said on its website that the players were protesting over unpaid wages at two first division clubs, Wilstermann and San Jose. The domestic championship would also be halted, Fabol said. Bolivia is due to kickoff its 2018 qualifying campaign at home to Uruguay on Oct. 8 before visiting Ecuador five days later. — Reuters