Pubdate: Mon, 07 Dec 1998 Source: Reuters Copyright: 1998 Reuters Limited. Author: Miguel Angel Gutierrez COLOMBIA, MEXICO TO BOOST FIGHT AGAINST DRUGS MEXICO CITY, Dec 7 (Reuters) - Mexico and Colombia agreed on Monday to boost their fight against the billion-dollar drug trade, signing an accord to improve cooperation against "the gravest threat" to peace and public security. Mexican President Ernesto Zedillo, welcoming his Colombian counterpart Andres Pastrana at the start of an official two-day visit, warned that the illicit narcotics industry threatened every aspect of political and social life. "We identify with our Colombian brothers in recognising that the narcotics trade is the gravest threat to health and families," Zedillo said. He added that drugs were "the gravest threat to public tranquillity and national security, to democracy and the integrity of our institutions. We know no action, no matter how powerful, is safe from this threat and we are convinced that it must be battled." U.S. anti-drugs officials say up to 70 percent of the Colombian cocaine sold in the United States passes through Mexico, most if it by land but also by small aircraft. The U.S. Drug Enforcement Administration has said that the two main drug cartels in the cities of Tijuana in the northwest and Ciudad Juarez across the border from Texas now rival the power and ruthlessness of the Colombian drug traffickers. Zedillo and Pastrana signed a bilateral agreement on Monday to improve the exchange of information and technical know-how in order to help each other's countries in their fight against cartels. They also signed other accords on trade, tourism, education and culture. Pastrana was due to hold talks with Zedillo after the signing ceremony before heading to City Hall to receive the keys of Mexico City from Cuauhtemoc Cardenas, the capital's first democratically-elected mayor and a presidential hopeful. During the accord-signing ceremony, Pastrana said only democracy could bring the national well-being necessary to counter the seductiveness of the drugs trade. "Ours are two countries which believe that democracy is the only instrument that can consolidate justice and peace as the one legitimate mechanism to fight poverty energetically," the Colombian president said. Pastrana also brought along a group of Colombian business leaders who were due to hold a seminar with Mexican entrepreneurs on Tuesday. Mexico City newspaper La Reforma reported on Monday that Colombian officials, well-versed in counter-insurgency methods and peace talks with guerrillas, might also be able to advise Mexico on how to deal with Zapatista Indian rebels in the troubled southern state of Chiapas. - --- Checked-by: Patrick Henry