Police on Tuesday registered an FIR and detained a man for allegedly dishonouring the national flag in Jammu and Kashmir`s Doda district after a video of the incident surfaced on the internet, officials said.

The video purportedly shows Farooq Ahmed, son of Mohammad Ramzan Banday and a resident of Nagri area of Doda, using the national flag to clean the window glass of his house, they said.