Officials are mapping where people smell cannabis in the Fens.
It comes after the weedy whiff was blamed on British Sugar's Wissington factory, which grows a strain of the plant used for medicinal purposes.
The smell was first noticed around two weeks ago, after the first crop of the plant was harvested. British Sugar has hired an odour consultant to investigate.
MORE - Odour consultant brought in to investigate mystery smellNow Fenland council has also launched an investigation. It says: 'Our Environmental Health team continues to investigate the issue with neighbouring authorities, with reports of the smell continuing to come in from across Cambridgeshire and Norfolk.
We need the public's help to assist with 'odour mapping' to pinpoint its source.
'When reporting the cannabis odour, please tell us the postcode/location of the smell (where you were when you smelt it), the date and time you smelt it, and, if possible, the wind direction at the time.'
To report the smell, click here.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here