Drug enforcement agents arrested four Mexicans who made a stopover at El Salvador's international airport while carrying $40,000 in cash, police said Tuesday.

The Mexicans, who were on their way to Colombia, were each carrying $10,000, the National Civilian Police, or PNC, said.

The suspects were arrested early Monday in the inspection area of the international airport, which is about 44 kilometers (27 miles) south of San Salvador.

The Mexicans were heading to Cali, Colombia, the PNC said.

The suspects were identified as Jose Roberto Padilla Rojano, 27, Yair Mendoza Angeles, 23, Carlos Jose Ramirez Navarrete, 35, and Cesar Arguello Perez, 32.

The men told investigators contradictory stories about why they were carrying the cash, with some of the suspects saying it was to be used to purchase musical instruments and others saying they were going to have medical examinations in Colombia, media reports said.

Investigators are trying to determine "if the $40,000 found was linked to drug trafficking or money laundering," the PNC said. EFE