Ash has blown 3km into the sky

There are fears the Turrialba volcano in central Costa Rica is building up for a major magma eruption after the ongoing series of explosions started on Wednesday.

Local reports said hundreds of locals had been taken to hospital suffering skin and breathing problems.

The eruptions have also caused local chaos with flights being cancelled or diverted and schools closing.

Ash has landed as far as 30 miles away in capital city San Jose where residents said it had covered cars and buildings and brought a strong sulphurous smell.

The National Emergencies Commission of Costa Rica has urged people to wear masks and tight clothing to protect lungs and skin.