Not a big deal, Klash and Explosive are easily available to local terrorist especially border District in South Kashmir. That was happened before.
However, i shall remind such Kashmiris and their terror sympathizes the famous words of great David Ben Gurion.
" we don't have power to ensure that water pipe line won't be exploded or trees won't be uprooted.We don't have the power to stop the murders of orchard workers or families while they sleep.
But we have a power to set a high price for our blood, a price which would be too High for Arab communities, Arab Armies and Arab govt to bear "
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So if you can afford the "high price" then sure go ahead do some bomb blast in Delhi.