MEXICO CITY | 
 
 MEXICO CITY (Reuters) - Mexico's federal police agency has replaced all 348 officers at the capital's international airport almost two months after police there shot dead three of their fellow officers in an alleged drug related killing. 
 
 The new agents have been drawn from across Mexico and have all passed psychological and drug tests, regional federal police chief Luis Cardenas said at a news conference. 
 
 Three federal policemen have been charged in the June 25 killings, which were embarrassing for President Felipe Calderon, who has waged a six year offensive against drug cartels. 
 
 One of those officers is in custody while two others are on the run. A cash reward has been offered for their capture. 
 
 Cardenas said the officers were involved in smuggling in cocaine from South America and attacked officers who spotted their wrongdoing. 
 
 All the other federal police officers who worked at the airport have been reassigned to other posts across Mexico, Cardenas said. 
 
 There have been than 55,000 drug related killings, including those of 3,000 police officers, in Mexico since Calderon took office in late 2006. 
 
 Enrique Pena Nieto of the opposition Institutional Revolutionary Party will assume the presidency in December and has promised to quickly reduce the number of drug related killings. 
 
 (Reporting by Ioan Grillo; Editing by Doina Chiacu) 

 Mexico's federal police have replaced all 348 officers assigned to security details at the Mexico City International Airport in the wake of the June 25 shooting deaths of three federal policemen killed by fellow officers believed to be involved in trafficking drugs through the terminal. 
 
 Federal Police regional security chief Luis Cardenas Palomino said the police agents have been reassigned to different states. They have been replaced by federal police who have passed double vetting and background checks. 
 
 One of the three officers sought in the shooting has been captured. Two others are still at large. 
 
 Cardenas Palomino said Sunday there is a reward of 3.4 million pesos, or $259,000, for information leading to their arrest. 
 
 The rogue officers were allegedly part of a trafficking ring that flew in cocaine from Peru. 

 (AP) MEXICO CITY - Mexico's federal police have replaced all 348 officers assigned to security details at the Mexico City International Airport in the wake of the June 25 shooting deaths of three federal policemen killed by fellow officers believed to be involved in trafficking drugs through the terminal. 
 
 Federal Police regional security chief Luis Cardenas Palomino said the police agents have been reassigned to different states. They have been replaced by federal police who have passed double vetting and background checks. 
 
 One of the three officers sought in the shooting has been captured. Two others are still at large. 
 
 Cardenas Palomino said Sunday there is a reward of 3.4 million pesos, or $259,000, for information leading to their arrest. 
 
 The rogue officers were allegedly part of a trafficking ring that flew in cocaine from Peru. 
 
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 3 cops killed in Mexico City airport shooting 
 
 Mexico troops detain son of most-wanted drug lord 
 
 Cartels are known to pay off police, cargo companies, security firms and even pilots and flight attendants to carry drugs and money, including more than $1 million packed into food cans and more than half a ton of cocaine in 13 cardboard boxes with tape bearing the logo of Mexicana Airlines. 
 
 Last year, customs agents found $2.5 million rolled up in spools of telephone cable headed for Venezuela, and an Aeromexico pilot was stopped in Madrid carrying 90 pounds of cocaine. That was several months after three Aeromexico flight attendants were caught in the Madrid airport with 300 pounds of cocaine in their luggage, a case that also saw the arrests of private security company employees operating the security checkpoints in Mexico City's airport. 
 
 In 2008, federal police chief Edgar Millan was gunned down inside his Mexico City home possibly in retaliation for investigating drug trafficking at the airport. The previous year, the severed heads of three employees of a customs brokerage firm were found near the airport and in the nearby state of Mexico. The decapitations were apparently retaliation for the seizure of a half-ton of Colombian cocaine at the airport, officials said at the time. 
 
 Benitez said Mexico's main airport has, in fact, become an alternative route for drugs from Colombia, Peru and Ecuador headed to Europe, while cash comes in from the United States. 
 
 It's the same problem in many international airports. U.S. federal agents swept through Puerto Rico's largest airport earlier this month, arresting dozens of baggage handlers, airline workers and others suspected of smuggling millions of dollars' worth of cocaine aboard commercial flights for at least a decade. Airline workers have been arrested in international smuggling operations involving airports in Detroit, Houston and New York, to name a few in the U.S.
– Following the June airport shooting deaths of three federal officers, Mexico has taken the drastic step of replacing all 348 security officers at the Mexico City International Airport with federal police. Since the June shooting was perpetrated by three fellow security officers suspected of being involved in cocaine trafficking, just one of whom has been captured, the new federal officers assigned to the airport have been double vetted and passed background checks, the AP reports. They also passed psychological and drug tests, Reuters adds. The original airport officers were reassigned. Drug cartels are known to use police, cargo companies, and airline personnel to transport drugs, and officers have been killed in the past in retaliation for cracking down on trafficking, CBS News notes.