Definitely a scam.  The IRS will send a letter to you if they have an issue to discuss with you.

Same here. Jennifer of India called and told me there was a warrant out for my arrest by the IRS. +1 347-377-8917

someone who called herself Susan Allen pretend o be from IRS and threatened that there was a arrest warrant issued

Re: susan allen.
Got a call from an Amber Z from financial investigations unit regarding an aggraved complaint against me. I should call her back before I am prosecuted. Govern myself accordingly. I reported to Federal Trade Comm. But returned the call to talk to them for more info just got voice message from office of susan allen. The number that called me 832-304-2123