A plastic bag containing 20 pounds of human faeces was left on a sidewalk in San Francisco.

Plastic bag containing 20 pounds of human faeces found on sidewalk

Plastic bag containing 20 pounds of human faeces found on sidewalk

Residents were left pinching their noses after walking past the ''the most atrocious smell'' over the weekend.

A Reddit user said he'd ''seen open faeces, smeared faeces'' before, but never seen ''anything like it''.

He wrote: ''I commend whoever put it in a bag. It could have been much worse.''

A spokesman for San Francisco's Department of Public Works told The San Francisco Chronicle newspaper that the mess was cleaned up on Saturday evening (30.06.18), and a DNA test was completed to find the origin of the waste.

He added how he was ''glad it was in one place and in a bag''.