The Shiv Sena activists arrived at Ghanta Ghar (Clock Tower) in two vehicles and were taken into preventive custody as soon as they alighted, a police official said.
The detained activists were taken to the Police Station Kothibagh where they were released after completing legal formalities, the official said.
The Jammu unit of the Shiv Sena had sent a special team to hoist the national flag in Srinagar following National Conference president Farooq Abdullah's remarks on Pakistan- occupied Kashmir last week.
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