"The security in the national capital, which is always kept on high alert, is beefed up around Independence Day. However, following the attack in Punjab's Gurdaspur district, a red alert alert has been issued here," a police officer told IANS.
He said special security arrangements have been made at all railway stations, bus stops, major markets and important government buildings and offices.
"People should not panic because of the attack in Punjab. We have already established all security measures here," the official said.
At least six people were killed and 10 injured when heavily-armed terrorists struck at Punjab's Dinanagar town early Monday.