Venezuelan security forces fired tear gas on crowds near the Colombian border Saturday as residents worked to clear barricaded bridges so humanitarian aid could enter the country, the Associated Press reports. Venezuela’s president, Nicolás Maduro, stands in opposition to letting humanitarian aid into the country, believing it’s an attempt to undermine his government. Three Venezuelan national guardsman left their posts this morning amid the tensions, and then asked for help from Columbia, the AP also notes. The increasing tensions along the border with Colombia come after Venezuelan soldiers killed two soldiers Friday near the country’s border with Brazil. Venezuelan Vice President Delcy Rodríguez announced Friday that Maduro’s government would launch a "temporary total closure" of the three main bridges between Venezuela and Colombia, where tons of medicine and food are stuck in a warehouse, NPR reported. Opposition leader Juan Guaidó has asked the military to ignore Maduro’s dictate.