Chief of Guatemala's national police and the country's anti-drug czar were arrested Tuesday in connection with the theft of cocaine and the killing of police, government sources said. National police chief Baltazar Gomez, anti-drug czar Nelly Bonilla and senior police officer Fernando Carrillo were accused of ordering a group of 10 police officers to steal 700 kg of cocaine and weapons from drug gang warehouses early last year. Five of the officers were killed in a shootout at the scene. The detentions were a blow to Guatemala's vow to clean up corruption and its campaign to crack down on drug trafficking, when U.S. Secretary of State Hillary Clinton will visit the country in two days to discuss the drug war. The past years have witnessed the arrests of a number of top law enforcement officials in charge of anti-drug trafficking and other organized crimes. 