British engineers say they have launched a "sewer war" against a giant fat blob clogging London's sewers.
Thames Water officials said on Tuesday it is likely to take three weeks to dissolve the giant fatberg.
They caution against expecting quick results as the fatberg is 229 metres long and weighs as much as 11 double-decker busses.
The unsavoury blob consists of congealed wet wipes, diapers, fat and oil.
Thames Water's Matt Rimmer says the fatberg is "a total monster and taking a lot of manpower and machinery to remove as it's set hard".
He said the task is "basically like trying to break up concrete".
Eight workers are using high powered jet hoses to break up the blob before sucking it out into tankers for disposal at a recycling site.
© AP 2017 Photo credit: Thames Water via AP