BOGOTA (Reuters) - The Venezuelan military used tear gas against volunteers unloading aid on the Francisco de Paula bridge along the Colombia-Venezuela border, a security video sent by a Colombian government source showed on Saturday.

The bridge, near the town of Urena, Venezuela, is one of three across which opposition leader Juan Guaido is hoping to pass much-needed food and medicine. The source said that Venezuelan soldiers had also fired rubber bullets but it was not immediately possible to verify that.