A 33-year-old man has been arrested after an 80-year-old woman was reportedly doused and set on fire outside her home in Watford. Police were called at about 12:45 GMT on Monday after the woman was found in a first-floor communal area at Caractacus Cottage View. The Hertfordshire force said she suffered life-threatening injuries and was taken to hospital, where she remains in a critical condition. Officers said they found the woman with significant burn marks within Caractacus Cottage View. Police believe she had returned home before being attacked by an unknown male, and that she was doused with a flammable liquid and set alight. The man, from Watford, has been arrested on suspicion of conspiracy to commit arson with intent to endanger life. He remains in police custody while the investigation continues. The investigation is being led by detectives from Hertfordshire Police.