The report describes the flags appearing on streets, bridges, rooftops and motorcycle convoys. Videos reportedly show groups carrying them during rallies, alongside slogans opposing the display of Brazil and Argentina flags.
That places the episode within a distinctive football culture. World Cup support in Bangladesh often extends beyond stadiums, with fans decorating homes, streets and public spaces. The scale of that mobilisation can turn national-team colours into visible markers of identity, rivalry and community.
The Arabic inscription has drawn scrutiny because similar religious symbolism has been associated with militant movements. However, the presence of a flag alone does not establish who organised the rallies, what they intended or whether the activity has any connection to extremist groups.
The report says authorities are trying to determine whether the displays are connected only indirectly to the football atmosphere or whether another objective lies behind them. That distinction matters: treating an unverified interpretation as fact could inflame tensions around both religion and football.
For now, the reported evidence points to a pattern requiring investigation rather than a confirmed security conclusion. The locations involved and the appearance of motorcycle convoys have increased official attention, but the motivation of those taking part remains unclear.
The next step is likely to be a clearer account of who produced the flags, who arranged the rallies and whether organisers had any direct links to football protests or wider political activity. Until those questions are answered, the episode should be treated as an unresolved investigation-not proof of a broader threat.
As World Cup displays continue across Bangladesh, authorities will face the challenge of protecting public safety without allowing a disputed symbol to define an entire football community.