mtiochondrial DNA: Is introns included? - Is there any introns in mtDNA? (Jun/14/2007 )

Greetings.
Recently i picked up mitochondrion genomic signal from my cDNA library. Theoritically cDNA library should not have genomic signal is it?
Thank you in advanced for your help.

Mitochondrial introns: a critical view.
Trends Genet. 2007 Mar;23(3):119-25. Epub 2007 Feb 5.

Thank you very much. Have a nice day.