The US has been conducting such exercises since a long time . No clue if India's involved in it . It'd be an extremely high risk operation either way.
As an aside I happened to come across an interesting PoV vide a few articles & whispers on SM like Twitter , YT etc from various sources , quite some time ago & attempted to piece together various bits of information .
Apparently the "surge" in Afghanistan ( look it up ) was not to deal with the Taliban there after the successful assassination of Bin Laden , it was to seize control of Pak nukes & FM . Fauji Foundation learnt of it & do you know what did they do ?
They went about actually distributing those warheads including tactical nukes said to go into the Nasr missiles - the equivalent of suitcase bombs among various formations who then drove with it in broad daylight in Jeeps on the streets of Peshawar , the messaging to the US being if you attempt a stunt like this we will ensure the terrorists get their hands on it .
Obummer lost his nerve & called off the operation offering to co operate with Fauji Foundation in securing those nukes , FM , mfg & storage facilities etc by introducing US technology vide safeguards & SOPs etc .