An investigation is underway after a house caught fire in Watford.

Hertfordshire Fire and Rescue was alerted to the blaze in Cassio Road at 7.45pm on Saturday, September 4.

Four fire engines, from Watford, Garston and Rickmansworth were rushed to the scene - firefighters found the first floor of a mid-terrace property well alight, the fire service said.

"Firefighters contained and extinguished the fire," a spokesperson said.

The fire service says it is working with Hertfordshire Constabulary to investigate the cause of the fire.

Police have been contacted for comment.