A case has been registered against a supplier of swab sticks used for collecting nasal and throat samples for Covid-19 testing, after a video allegedly showed that the items were being packed in unhygienic conditions at a slum in neighbouring Thane district, police said on Thursday.

Earlier this week, a video surfaced on social media, which showed that swab sticks were being packed at a slum in Sant Dnyaneshwar Nagar in Ulhasnagar, an official said.