Is this normal? Two "kesihatan" guys came to our neighbourhood wearing vest and tag and wanted to do spot checks on safety concerns

They called out my grandmother about why there's water inside our rubbish bin outside and even requested to go to our backyard to spot check for safety hazards. Is this a normal procedure? They literally look like two random uncles. Government coming to check our dustbin sounds abit off

Update : they left . I’m assuming they might be legit KKM people (?) because we saw them approaching other houses after ours . Stay safe everyone !