JNUSU President Kanhaiya Kumar's security can be beefed up by Delhi Police, post a country-made pistol and a threat letter was found. The weapon was recovered in a bus operating between Kashmere Gate ISBT and the JNU campus, after the driver spotted an unclaimed bag and raised an alarm. After the alert, the police are likely to increase his security cover and also enhance vigil around the JNU area, the official added.