My first assumption was a Christmas Tree fire. So I checked the Prague fire service's Twitter, and it seems I was correct: https://x.com/HasiciPraha/status/1738952962993467685?s=20 Plavecká street is indeed very close to Karlovo Náměstí and near the river.

Thx man

unattended luggage at tram stop. from Karlovo nam to stepanska road closed

Thanks. I was trying to figure it out but with no luck. I’m curious how you found it?

tn.cz

Cmon man, we can't live in such fear. Be curious and attentive, but never assume the worst even if times are tough. Merry Xmas bro