Czech police have arrested the American boss of truckmaker Tatra on charges of bribery, a company spokesman said on Tuesday, the latest step in an anti-corruption drive which has seen several ministers and senior government officials facing charges. However, a court ruled later on Tuesday that Ronald Adams, who has run privately-owned Tatra since 2006 as chairman, would not be taken into custody as requested by the police who have charged him with offering a bribe to win army contracts.