Boston marathon runner is caught on doorbell cam POOPING on stranger's front lawn

Mortifying video footage has revealed the moment a Boston marathon runner was caught pooping on a stranger's front lawn during the 26.2 mile race on Monday. 

The runner was snapped in the compromising position by a homeowner's doorbell camera - which showed the person drop their shorts and squat on the grass.

A few seconds into the footage, the long-distance runner appears to be spotted by a passerby who walks towards them on the lawn before stopping in their tracks. 

The pair then seem to have an awkward stand off, with the spectator walking towards the runner before appearing to have second thoughts and swiftly stepping back again.

The spectator is then joined by another person - before the runner sheepishly pulls up their shorts and makes a quick getaway back to the race by cutting through some trees at the edge of the yard. 

The runner was snapped in the compromising position by the homeowner's doorbell camera

Nearly 30,000 athletes from more than 100 countries took part in the annual race on Monday from Hopkinton, Massachusetts, to downtown Boston.

According to the New York Post, the video was originally posted on Reddit, with the homeowner titling the footage: 'One of the marathon runners just took a s*** in my yard.'

The video has reportedly been removed from Reddit, but can still be viewed on Twitter. 

Users have since flooded to the social media site to express their disgust and horror at the video, while others found it entertaining.

One person joked: 'Free fertilizer', while another wrote: 'S*** happens!'

'This is very unfortunate,' wrote another. 'This runner should know better and there were plenty of port-o-potties on the course.'

According to the marathon's official site, toilets are located 'at every water and medical station, as well as at additional locations along the course'.

The site added: 'Please respect the communities through which the Boston Marathon runs by taking advantage of these facilities, if needed.'  

A few seconds into the video, the long-distance runner appears to be caught by a passerby

The passerby appears to notify another person about what is going on, while the runner disappears back into the race

According to the marathon's official site, toilets are located 'at every water and medical station, as well as at additional locations along the course'

This year's race marked the tenth anniversary of the Boston Marathon Bombing, where three people were killed and hundreds injured. 

Brothers Dzhokhar and Tamerlan Tsarnaev planted two homemade pressure cooker bombs which detonated near the finish line of the race.

The bombs killed Martin Richard, Lingzi Lu, 23, and Krystle Campbell, 29. MIT police officer Sean Collier, 27, was later shot to death by the bombers, and Boston police officer Dennis Simmonds, 28, died a year after being injured in the manhunt that followed the attack. 

Friends of Martin Richard, who was eight when he was killed that day, ran the race this year in his honor.