Police fired teargas canisters to disperse a crowd of rowdy youths staging anti-India protests Friday in the capital of India-controlled Kashmir.
Dozens of youths emerged from Srinagar's main mosque after Friday prayers, shooting firecrackers, burning an Indian flag and shouting pro-Pakistan chants. The demonstrators threw rocks at security forces before the gathering was broken up.
Islamic separatists in Kashmir have been fighting to merge with Pakistan or to establish an independent homeland for two decades.
Military officials say India's many states have been asked to bolster their security measures ahead of Independence Day celebrations on Saturday.
Security officials in Srinagar say there will also be increased security at the stadium where the main festivities will take place.
Meanwhile, security has also been tightened in Kolkata.
India will mark the 62nd anniversary of independence from its former colonial power, Britain.