In Venezuela, 33 people have been arrested during protests on the the metro system in the Venezuelan capital, Caracas. The passengers were demonstrating over the poor service of the underground network, which, they say, has deteriorated rapidly in recent months. Police said the passengers prevented a train from leaving a station, and accused them of sabotage. The arrests were the culmination of several weeks of growing anger among commuters in Caracas over the state of the metro system. Last month, the government appointed a new head of the metro system to try to tackle the network's problems.