This is a deliberate fire and there is no evidence that anybody left that house.

BBC: NEWS | UK | England | Lancashire | Murder probe as five die in fire

Bridget Sharkey and her 21-year-old brother Thomas died following a deliberate fire at their home in Scott Court, Helensburgh on 24 July.

BBC: Sharkey fire murders: birthday appeal issued

The jury in the trial of two men accused of murdering a man and his two children in a deliberate fire has heard of the family's last moments together.

BBC: Thomas Sharkey Snr, Bridget and Thomas Jnr

However, unnamed hospital sources quoted by El Mundo said the severity of his injuries, and speed with which the fire had spread, suggested his action had been deliberate.

BBC: Spain Malaga: Jobless man 'burns himself to death'

Cumbria Fire and Rescue Service has dealt with more than 50 deliberate grass and gorse fires over the past two weeks.

BBC: Siddick Ponds nature reserve damaged by fire

Cumbria Fire and Rescue Service has dealt with more than 50 deliberate grass and gorse fires over the past two weeks and has blamed the increase on youngsters on holiday from school.

BBC: Fire at Siddick Ponds

From a virus's perspective, there will be a single mass of humans, tightly connected by air travel, with plenty of susceptible people to fuel the fire of new plagues, whether natural, accidental or deliberate.

ECONOMIST: Science