* Suit alleges unfair competition, other breaches
* LabCorp believes allegations are without merit
LOS ANGELES, Aug 26 (Reuters) - Health insurer Aetna Inc (AET.N) has filed a lawsuit against Laboratory Corp of America (LH.N), alleging unfair competition, breach of contract and other violations of law, the lab-testing company said in a regulatory filing on Thursday.
Aetna is seeking unspecified monetary damages and equitable relief.
LabCorp said it believes that the allegations are without merit and it will vigorously defend the lawsuit.
Reporting by Deena Beasley; Editing by Bernard Orr