Venezuela tense as cops block anti-president march

Caracas: Riot cops fired tear gas to head off a protest march today by opponents of Venezuela's President Nicolas Maduro who were demanding a referendum on removing him from office.

Political leaders and analysts warned tensions could erupt into unrest as the center-right opposition staged rallies across the crisis-hit South American country.

Protesters were demanding electoral authorities quickly approve their call for a vote on dumping the socialist leader.

Security forces blocked the street to keep demonstrators away from the headquarters of the National Electoral Board (CNE) in Caracas. A small number of tear gas canisters were fired.

The opposition coalition MUD said in a statement that one of its top leaders, Henrique Capriles, was affected by the tear gas as he led the march.

"I am alright. We Venezuelans want a recall referendum and change," Capriles wrote later on Twitter. "Maduro will not overcome the people!"

The Democratic Unity Roundtable (MUD) blames Maduro for an economic crisis in which Venezuelans are having to queue for hours for rations of basic food and other goods.

Maduro has also imposed daily electricity blackouts and has public employees working just two days a week due to power shortages.

Security forces reportedly blocked streets to head off similar demonstrations today in other towns such as Zulia in the northeast.

Separately, looting reportedly broke out at a food store in the city of Maracay, state ombudsman Tarek William Saab told reporters.

With robberies and violence reportedly surging, the military also said on Tuesday that nine people had been killed in a crackdown by security forces around Caracas.

Some 3,000 troops and police have been deployed there to go after gangs, the government said.

Thousands of supporters of Maduro also rallied separately today in the center of the capital.