In Vodafone case also, the department did the same thing.
Here is a link to the Cairn story :
Modi and Jaitley merely seem to be mouthing promises of not harassing people. If I read between the lines, it looks like the new owners of Cairn India have not fully met some demand of you-know-who.
Like in the Vodafone case, the Income Tax dept of India is the only body in the world which does not approach the seller who made the capital gain (In Vodafone case, it was Essar & Hutchison Whampoa) but rather wakes up after a few months or years to chase someone else. It clearly is a sign of a failed extortion attempt..