As it happened: Venezuela border tension - BBC News
Latest updates as Venezuelan authorities try to block opposition-led efforts to deliver humanitarian aid.
While tensions flared on Venezuela’s borders, there was relative calm in the capital, Caracas.

Thousands of people turned up for an opposition march, many dressed in white, a symbol of peace.

"More medicine, fewer bullets," read one of the signs carried by the demonstrators. Another read: "Maduro, you’re the cancer of Venezuela."

The crowd marched to the military barracks - all part of a strategy to pressure the armed forces to side with Juan Guaidó and let the humanitarian aid in.

One woman described today as "breaking point" for Maduro.

It’s certainly a test for the president. But apart from a handful of defections at the border, so far his senior officers have remained loyal.

President Maduro waves the national flag during a pro-government march in Caracas Image caption: President Maduro waves the national flag during a pro-government march in Caracas

And there are still those who back Maduro over what they say is a trojan horse in the form of US humanitarian aid.

Not far away from the opposition march, Chavistas and government workers gathered, many dressed in red - the colours of the president’s socialist party.

"Hands off Venezuela", was the message from here.

"If they want to help, lift all the sanctions against our country," state worker Frank Marchan told me. "We don’t need their mercy."