The municipal authorities in the Peruvian capital, Lima, have imposed special security measures in the city centre to try to control the illegal manufacture and sale of fireworks.

All goods entering or leaving a fifteen-block zone are to be inspected.

The emergency measures follow an explosion on Monday in a clandestine fireworks factory, which killed seven people.

A correspondent for the BBC in Lima says the explosion has provoked widespread concern in the city, which is home to many similar factories.

For its part, the municipal government has criticised the police for failing to support its inspectors in closing illegal premises.